Six Onion Tart

My friend Jon Rowley, who is the person who taught me this pastry dough recipe, albeit for a sweet pie, talks about the incredible advantage gained in an apple pie by using a variety of apples. I decided to use his pastry dough and his diversity theory on an onion tart to see how it would pan out.  And, I think it was a success. The theory driving the pie idea is that, when cooked, the variety will give you several textures and flavors.

I think this pastry is a natural for savory pies because of the leaf lard. I wrote in great detail about leaf lard in my recent chocolate pie post, but suffice to say that it isn’t as bad for you as was once believed. In fact, it is widely thought that unprocessed lard is better for you than an equal portion of butter. This is un-hydrogenated lard. Mind you, I am not talking about just any lard that you will find on a shelf at the grocery store at room temperature.

Lard is not absolutely essential here, and you can certainly get away with using shortening, instead. But I am a leaf lard convert. I’m not sure I’ll ever go back. In the notes section below, I will give you the low down on a great source for leaf lard. But for now, back to the onions.

I honestly set about getting as many onion varieties as I could at the grocery store. I chose two shallots, a white onion, a yellow onion, a sweet onion, a purple onion, leeks, and green onions. Perhaps this is a bit excessive. If I were to drop two from this list it would probably be the purple and the green onions. The green would go because one bunch of green onions only yields about 2 Tablespoons of onion, and the purple because…just because. But it was great fun using them all. My onions were rather large and I had more than I needed for one pie. It would have definitely overfilled a traditional tart pan. I would suggest, if you do not have an elongated pan like the one pictured, that you use a pie plate so that you have some depth to hold all of the onions.

I also held back on the seasoning because I really wanted it to be all about the onions. Often, nutmeg is added to these types of tarts, but the onions are already quite sweet from the process of sautéing. I didn’t want to push it any further in the sweet direction. For me, a few shakes of Tabasco sauce and some salt and pepper were all that was needed.

I chose an aged white cheddar for the filling. I tossed around the idea with Joey, a chef who works at the cheese counter at the Park Lane Whole Foods, and he also recommended Gruyere. But since I have used that a lot lately, and I simply had a feeling that white cheddar was the right choice for me, he guided me to a great one.

This easily makes 8 to 10 slices. It is quite rich. And it would make a great lunch dish served with a salad. It would be a wonderful side dish for a big steak, as well.

Incidentally, since I had a little extra filling, I cooked it in a ramekin alongside the tart. I think it would work for a gluten free side. If you choose instead to cut back on the onions, consider using one less egg and a splash less cream.

Six Onion Tart
Recipe type: Entree
Prep time:
Cook time:
Total time:
Serves: 8
The instructions look complex, but this is a fairly straightforward tart. If you love onions, you will love this.
For the crust
  • 1½ cups all purpose flour
  • 4 tablespoons butter
  • 4 tablespoons leaf lard
  • ½ teaspoon salt
  • 4 to 6 Tablespoons cold water (a little more if needed)
For the filling
  • 3 slices bacon, sliced into small bits
  • 1 tablespoon butter
  • 4 leeks, white and light green part only, sliced into disks
  • 3 to 4 medium assorted onions (white, yellow, purple, sweet), cut in half then into ⅓” slices
  • 2 shallots, diced
  • 1 bunch green onions, white and light green part only, sliced into disks
  • 4 eggs
  • ½ pound aged white cheddar, shredded
  • ¾ cup heavy whipping cream
  • 3 to 4 dashes of Tabasco Sauce
  • Salt and Pepper
  1. Place the measured lard, butter and flour in the freezer to chill 30 minutes before proceeding.
  2. Put the chilled butter, lard, flour and salt into a medium size bowl and work the flour into the fats with a pastry cutter or a fork, and then your hands. You may use a food processor instead and pulse the ingredients approximately 10 times, removing the dough to a work surface before proceeding. Once the flour and fats are combined and you have worked the fats down to the size of peas, you can sprinkle the water on top and work it into the dough. When the dough is sufficiently moistened to hold together, stop working it. Wrap it in plastic wrap and shape it into a flat disk and put it into the refrigerator to rest for an hour.
  3. Preheat the oven to 375 degrees.
  4. In a heavy pot over medium heat, sauté the bacon until crisp. Remove the bacon with a slotted spoon to a plate lined with a paper towel. The rendered bacon grease stays in the pot. Reduce the heat to medium-low and add the butter to the bacon grease and allow it to melt. Add all of the onions and leeks to the pot. Stir them every 5 minutes or so for 30 minutes until they have softened and reduced significantly in volume, but not browned. Remove the onions to a large bowl to cool for a few minutes. If there is juice left at the bottom of the pot, bring it to a boil and let it reduce to nearly nothing and add it back in with the onions. Add the chopped bacon to the bowl.
  5. In another medium bowl, whisk together the cream, eggs and cheese. Add the Tabasco, salt and pepper and stir to combine. At this point, the onions are too hot to pour the custard directly into the onions. You would have scrambled eggs. Instead, add a forkful of onions at a time to the custard and stir them in. Add another forkful and stir them in. Continue this until the custard bowl is almost full of onions, and then add them all into the larger bowl of onions. Set aside.
  6. Take the pastry dough from the refrigerator. Dust your pastry cloth or countertop with flour and roll out the dough to the necessary size depending on the dish you are using. Move the pastry to the dish and fit it into the dish. Do not stretch the pastry to accomplish this. Cut off all but a quarter of an inch of the excess dough. Fold the edge of the dough back under itself and crimp the edges if you desire or press the dough lightly against the edge of the dish. Poke the bottom of the pastry several times with a fork. Gently spoon the filling into the crust.
  7. Bake for 1 hour. Test the doneness by pushing a toothpick into the middle of the tart. It will come out a bit wet, but it should not come out goopy. The middle should be set. Remove the baking dish from the oven and let it cool for a minimum of 15 minutes on a wire rack. You may also allow it to come to room temperature before serving. Cut into pieces and serve.

I love using my enamel coated pots for cooking onions. I’m not sure what the magic is, but they are much more gentle on the onions when you are trying not to caramelize, but just cook.


Leaf lard is the rendered fat of a pig from around the kidneys. It is widely regarded as a superior fat for making pastry. I have now had several experiences working with it, and I have even rendered my own lard using fat I purchased at a local grocery store. I do not think it was purely leaf fat, unfortunately, but it worked great too. The prettiest, yes I said prettiest, lard I have used was purchased at Dietrich’s Meats in Pennsylvania. They do only phone orders and you send them a check and they send you pure, creamy, white leaf lard.

Local meat producers are also getting back into this game so if you have a pork vendor at your local farmers market, by all means ask them if they have any leaf lard.

I was about to eat the leftovers of this tart for lunch and put it out on the counter to come to room temperature. I went to my desk to do some work and 10 minutes later my dog Poppy came in looking very, very guilty. I never learn. She never fails to take advantage of that fact. And, now I cannot tell you how it tasted on day two. But it still looked wonderful.

Finally, the dish I used here was 12” by 8”. This is ample dough and filling for a 9” or 10” pie plate. Or get creative. There is no rule that says you have to use any particular baking dish for any particular tart. Get into my slightly fly-by-the-seat way of cooking and just grab something and go with it.


  1. Kelly says

    Dad…you would clearly be thoroughly impressed with Poppy’s track record. She has an incredible nose and great vertical skills, if you know what I mean. The dog has eaten her weight in softening butter sticks in the last 6 years, not to mention countless pies, cakes and meticulously hand decorated cookies. It is as if she is saying, “if you would just invite me to the family table and give me one, I wouldn’t have to keep doing this to you.” Funny dog…and I love her.

  2. says

    Cooking with lard reminds me of my childhood. We used to eat cod fish fritters deep fried in lard all the time when we sent to the beach. You can still find those on the side of the roads by the beach.

  3. says

    Hi Kelly,
    I’m a friend of Karen Wayman’s….and she turned me onto your blog. I love it!!!! Gorgeous photography, witty writing…and for starters, I want to make this salad.

    ~ Elizabeth

  4. Kelly says

    Love Karen Wayman! She is a jewel. And, I love your blog as well. Good stuff. I’m so glad you dropped by PIE. And thanks for the kind words, too.

  5. says

    Love your website as I am a fellow lover of pie. I was looking up something about lard or making your own and somehow ended up on your site and was so glad to see the chocolate pie post and leaf lard. I immediately ran down to Kubys and all I found there was snow cap lard which I dont think is leaf lard. However, it did improve my pie crust on my fried cherry pies! I have been tinkering with and consternating over my pie crust for the past 30 years and now have finally settled on the butter and lard combo. Thanks for a great blog.

  6. Kelly says

    Yes. You are right. Try Dietrich’s Meats ( in Krumsville Pennsylvania. They sell pure leaf lard over the phone and ship it promptly. I’m a big fan. If you are ever in Austin, Dai Due also sells leaf lard. It makes a huge difference, I think. I’m a lard convert.


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