Vegetarian Black Bean Chili

Ingredients

• 2 1/4 cups (15 oz) black beans
• 3 tablespoons olive oil
• 3 medium yellow onions, chopped
• 2 serrano or jalapeno peppers, seeded (if desired) minced
• 5 large cloves garlic, minced
• 6 tablespoons chili powder
• 3 tablespoons ground cumin
• 1/4 teaspoon cayenne
• 1 teaspoon dry oregano
• 2 cans excellent quality crushed tomatoes, such as Muir Glen Tomatoes, (28 oz. each)
• salt and freshly ground pepper
• 1 cup coarsely grated Monterey Jack cheese