Recipe: Caramelized Onion, Apple and Brie Tartlets

Caramelized Onion, Apple and Brie Tartlets
Servings 36 each

2 tablespoons olive oil
7 cups thinly sliced white onions (about 3 medium)
1-1/2 tablespoons minced fresh thyme
1 sheet frozen puff pastry (half of 17.3-ounce package)
1 6-ounce Granny Smith apple, peeled, quartered, cored, thinly sliced crosswise
2 6-ounce wedges chilled Brie cheese, rind removed, cheese cut into 1/4-inch-thick slices, each slice cut crosswise into thirds

Heat oil in heavy large skillet over medium heat. Add onions and saute until deep golden brown, about 30 minutes. Mix in thyme. Season to taste with salt and pepper. Cool. (Can be prepared 1 day ahead. Cover and refrigerate.)

Roll out pastry on lightly floured work surface to 12-inch square. Cut pastry lengthwise into six 2-inch squares, for a total of 36 squares. Place pastry squares, spacing apart, on 2 large baking sheets. (Can be prepared 1 day ahead. Cover and refrigerate.)

Preheat oven to 350 F. Spoon 1-1/2 teaspoons onion mixture atop each pastry square. Top with 2 apple slices. Bake until pastry is golden brown, about 20 minutes. Top each square with 1 piece cheese and bake just until cheese melts, about 3 minutes. Transfer to platter.