Can be prepared in 45 minutes or less.

　　

Ingredients

Makes 2 tarts

　　1 sheet (about 1/2 pound) frozen puff pastry, thawed

　　2 1/2 teaspoons anchovy paste, or to taste

　　1 cup coarsely grated mozzarella (about 4 ounces)

　　1/2 cup freshly grated Parmesan

　　1 1/2 pounds vine-ripened tomatoes (8 small to medium), sliced thin

　　1 small red onion, halved lengthwise and sliced thin

　　2 teaspoons chopped fresh rosemary leaves

　　2 teaspoons chopped fresh thyme leaves

　　

Step 1

Preheat oven to 425°F.

　　

Step 2

On a lightly floured surface with a floured rolling pin roll out pastry into a rectangle roughly 17 by 15 inches and trim edges to form a 16- by 14-inch rectangle. Halve pastry lengthwise, forming two 16- by 7-inch rectangles.

　　

Step 3

Brush edges with water and fold in edges to form a 1/2-inch wide border on each rectangle. With tines of a fork press border to seal. Transfer rectangles to a large baking sheet.

　　

Step 4

Divide anchovy paste between rectangle and spread in a very thin, even layer. Sprinkle each tart evenly with 1/2 cup mozzarella and 2 tablespoons Parmesan. Arrange tomato slices in one layer on cheese. Scatter onion slices and herbs over tomatoes and sprinkle with remaining 1/4 cup Parmesan and salt and pepper to taste.

　　

Step 5

Bake tarts in upper third of oven 12 to 15 minutes, or until crust is golden. Tarts may be made 2 days ahead and chilled, covered loosely. Reheat tarts before serving. Serve tarts warm or at room temperature.