Tarte aux Moutarde (French Tomato and Mustard Pie)

Ingredients

• 1 refrigerated pie pastry , 9 inch
• 0.5 cups grainy brown mustard
• 6 slices Swiss cheese , about 1/4-inch thick
• 3 large ripe tomatoes , thinly sliced
• 1 tablespoon olive oil , or as needed
• 2 tablespoons herbes de Provence

Instructions

1. 1

   Preheat the oven to 375 degrees F (190 degrees C). Fit pie pastry into a 9-inch pie dish. Poke holes in bottom of crust with a fork.

2. 2

   Spread mustard evenly over bottom of crust. Cover with Swiss cheese, then arrange tomato slices over top to cover cheese in a spiral, from the outer edge to the center. Drizzle oil over tomatoes and sprinkle herbes de Provence over top.

3. 3

   Bake in the preheated oven until crust is golden brown, cheese is melted, and tomatoes are curled at the edges, about 20 minutes.