Smoky Braised Mexican Pumpkin
Ingredients Three to six 1/4-to-1/2- ounce stemmed, dried chipotle chiles, or canned chipotle chiles en adobo 3 large cloves garlic 5 medium (about 8 ounces) tomatillos, husked, rinsed, and halved 2 medium round, or 4 to 5 plum, ripe tomatoes, or one 15-ounce can fire-roasted tomatoes 1 tablespoon olive oil 1/2 pound lean, boneless pork shoulder, cut into 1/2-inch pieces (optional) 1 medium white onion, thinly sliced 1 1/2 cups sliced Swiss chard...