Vegetarian Lentil Chili with Corn and Black Beans

Name: Vegetarian Lentil Chili with Corn and Black Beans
Ingredients: 2 cups lentils, washed and picked over; 2 tablespoons olive oil; 1 really big red onion, diced; 6-8 cloves garlic, minced; 2 teaspons minced fresh thyme; 6-8 tablespoons pure chili powder; 2 teaspoons ground cumin; 2 teaspoons sea salt; freshly ground pepper, lots of it; 1/2 cup chopped red bell pepper (but only if it's on sale, otherwise use two green peppers); 1/2 cup chopped green bell pepper; 1 quart vegetable stock; 1 28-ounce can crushed tomatoes; 1 14 1/2 ounce can black beans; 2 cups corn, cut from the cob or frozen; 1 tablespoon chopped cilantro; hot pepper flakes, to taste; sour cream and lime wedges, for serving