Hatch Green Chili Stew

Name: Hatch Green Chili Stew
Ingredients: 2 pounds pork shoulder, cut into bite sized cubes; 2 tablespoons salt; 1 tablespoon ground cumin; 1/2 tablespoon ground coriander; 1 teaspoon ground black pepper; 2 tbs sour cream; 1 pound mild hatch green chiles; 2 poblano chiles; 3 serrano chiles; 2 jalapeños; 1 onion, skin removed, quartered; 4 tomatillos, skins removed, halved; 1/4 cup white vinegar; 6-8 cloves of garlic, skins removed; 1 tablespoon Mexican oregano; 8-10 leaves of fresh epazote (optional); 1/4 cup canola oil; 2 bay leaves; 4 cups water or broth; 1 pound waxy potatoes