Tomatillo Chicken Stew

Name: Tomatillo Chicken Stew
Ingredients: 1 1/2 lbs tomatillos; 1-2 jalapeño chile peppers, or 2-3 serrano chili peppers (include the seeds if you want the heat, remove them if you don; 1 clove garlic, chopped; 1 teaspoon salt; 2 Tbsp lime (or lemon) juice; Pinch of sugar; 2 lbs boneless, skinless chicken thighs or breasts, trimmed of excess fat, cut into 1-inch cubes; Salt and pepper; Olive oil; 2 yellow onions, chopped; 2 cloves garlic, minced; 1 teaspoon ground cumin; 1 teaspoon ground coriander; 1 1/2 cup chicken stock; 2 cups tomatillo sauce; 1 teaspoon dry oregano or 1 tablespoon fresh, chopped; 1/2 cup packed chopped cilantro (about one bunch, rinsed and chopped, stems and leaves)