Unbelievably Delicious French Tomato and Mustard Pie

Lyon, France is considered by some to be the gastronomic capital of the world. I moved there with the intent to learn this cuisine. This French tomato tart is not only a family favorite, but it’s a very typical Lyonnaise dish. There are a lot of tomatoes in Lyon in the summertime, so this dish became a staple. It’s wonderful for picnic lunches, and any leftovers are great as a next-day treat.

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