Tomato Galette With Savory Oat Crumble
1 sheet frozen puff pastry, preferably Dufour brand (14 ounces; see note)
¼ cup plus 2 tablespoons old-fashioned rolled oats (do not use instant or quick-cooking oats)
¼ cup flour
½ teaspoon dried herbes de Provence
¼ cup freshly grated Parmigiano-Reggiano cheese
½ teaspoon kosher salt
¼ teaspoon freshly ground black pepper
3 tablespoons cold unsalted butter
About 4 ounces (½ cup) mascarpone cheese
12 to 16 ounces small-variety tomatoes, preferably a mix of colors
Preheat the oven to 400 degrees. Cut or have at hand a piece of parchment paper measuring about 12 by 17 inches. Unwrap the frozen puff pastry dough and let it rest on the counter near the preheating oven.
Meanwhile, combine the oats, flour, herbes de Provence, Parmigiano-Reggiano cheese, salt and pepper in a mixing bowl. Cut the butter into small pieces and add to the bowl; work them into the dry ingredients to form a crumbly mixture that clumps together when you gently squeeze it.
Gently unfold and roll out the puff pastry dough directly on the parchment paper to the size of the paper, using your clean fingers to smooth over any cracks. Spread the mascarpone over the dough, leaving a 1-inch margin all around.
Cut some of the tomatoes in half and leave some whole (amount to taste), then scatter them over the mascarpone. Sprinkle the oat crumble mixture evenly over the tomatoes, then crimp up the edges of the dough to create a kind of free-form tart (or simply use a sharp knife to score around the edges of the galette topping). Bake (middle rack) for 25 to 30 minutes, so the crust is browned and the tomatoes have softened.
Note: If you buy the puff pastry a day in advance, you can let it defrost in the refrigerator. Dufour frozen puff pastry is available at Whole Foods Markets.
Let sit for 5 minutes before serving warm or at room temperature.
Makes 6 to 8 servings
Nutrition | Per serving (based on 8): 360 calories, 5 g protein, 21 g carbohydrates, 28 g fat, 15 g saturated fat, 80 mg cholesterol, 290 mg sodium, 0 g dietary fiber, 1 g sugar
Adapted from "One Pan and Done: Hassle-Free Meals From the Oven to Your Table," by Molly Gilbert (Clarkson Potter, 2017).