Mushroom-and-Leek Tart

Name: Mushroom-and-Leek Tart
Prep time: 25 min
Total time: 45 min
Yield: 8
Ingredients: 3 tbsp. unsalted butter, divided; 1 lb. mushrooms (such as button), thickly sliced; 1 large leek, white and light green parts only, sliced into rings (1/2-inch thick); 2 cloves garlic, chopped; 2 tsp. chopped fresh thyme, plus more whole leaves for garnish; Kosher salt and freshly ground black pepper; all-purpose flour, for work surface; 17 oz. puff pastry, thawed; 2 tbsp. Dijon mustard; 1 oz. Parmesan cheese, grated; 1 large egg, beaten

By Marian Cooper CairnsPublished: Mar 5, 2015

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Christopher Shane

Yields:

Prep Time:

25 mins

Total Time:

45 mins

Thanks to packaged puff pastry, this fresh springtime tart is super simple to make.

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Ingredients

3 Tbsp. unsalted butter, divided
1 lb. mushrooms (such as button), thickly sliced
1 large leek, white and light green parts only, sliced into rings (1/2-inch thick)
2 cloves garlic, chopped
2 tsp. chopped fresh thyme, plus more whole leaves for garnish
Kosher salt and freshly ground black pepper
all-purpose flour, for work surface
17 oz. puff pastry, thawed
2 Tbsp. Dijon mustard
1 oz. Parmesan cheese, grated
1 large egg, beaten

Directions

1. Step 1Preheat oven to 400°F. Melt 2 tablespoons butter in a large skillet over medium-high heat. Add mushrooms and sauté until golden brown, 6 to 8 minutes. Remove mushrooms to a plate; reserve skillet. Add remaining tablespoon butter, leek, garlic, and thyme to reserved skillet and sauté until leek is wilted, 2 to 4 minutes. Stir in mushrooms and season with salt and pepper.
2. Step 2Lightly flour work surface. Unfold pastry and roll, sealing seams if necessary, into a 10-by-12-inch rectangle. Cut pastry into two 5-by-12-inch rectangles and place on 2 parchment-lined baking sheets. Lightly prick the dough with a fork, leaving a ¾-inch border all around. Spread the mustard on dough, inside the border. Sprinkle with Parmesan and top with mushroom mixture. Brush edges of pastry with egg.
3. Step 3Bake until edges are golden brown, 16 to 18 minutes. Garnish with thyme.