Caramelized-Onion Tartlets

1. 1

   Put oven rack in middle position and preheat oven to 375F.

2. 2

   Cook onion, butter, water, salt, and pepper, covered, in a 10-inch heavy skillet over moderately low heat, 10 minutes.

3. 3

   Remove lid and cook, stirring frequently, until onion is deep golden brown and very tender, about 25 minutes.

4. 4

   While onion cooks, roll out dough to slightly less than 1/8 inch thick.

5. 5

   Cut out 12 rounds with cutter and lightly press each into a mini-muffin cup.

6. 6

   Bake until pale golden, 10 to 12 minutes.

7. 7

   Remove tartlet shells from muffin pan.

8. 8

   Stir together creme fraiche and chives and divide among shells, then top with caramelized onions.

* Per serving · 4 servings · Values may vary.