Ziti with Poblanos and Chipotle Sauce

Directions

1. 1.

   Cook onion, poblanos, and 1/2 teaspoon salt in oil in a heavy medium pot over medium heat, covered, stirring occasionally, until onion is golden, 8 to 10 minutes. Add red peppers and cook, stirring occasionally, until onion is tender, 2 to 3 minutes.

2. 2.

   Meanwhile, cook ziti in a pasta pot of boiling salted water (2 tablespoons salt for 6 quarts water) until al dente. Reserve 1 cup cooking water, then drain ziti.

3. 3.

   While ziti cooks, purée chipotles with sour cream in a blender.

4. 4.

   Add purée to onion mixture with scallions, cilantro, 1/4 cup cooking water, and 1/2 teaspoon salt and bring to a simmer, stirring. Add ziti and toss, moistening with additional cooking water if desired. Season with salt.