Pork and Poblano Stew

Name: Pork and Poblano Stew
Ingredients: 4 to 5 poblano chile peppers (about 3/4 pound ); 1 tablespoon extra virgin olive oil; 2 1/2 pounds pork shoulder , trimmed, cut into 1- to 2-inch pieces; Salt; 1 large onion , chopped (about 2 cups); 1 teaspoon cumin; 3 to 4 cloves garlic , minced; 1 chipotle chile in adobo , minced; 1 tablespoon dried oregano; 1 quart chicken stock (use gluten-free stock for gluten-free option); 1 1/2 cups fresh or frozen corn (no need to defrost if frozen); 1 large (about 1/2 pound) sweet potato , peeled and diced (about 1/2- to 3/4-inch cubes); Sour cream; Cilantro; Toasted shelled pumpkin seeds (pepitas), optional