1. Combine all ingredients except rice and toppings in slow cooker. Cover and cook on low for 6-6 1/2 hours, or until bell peppers are tender. 2. Spoon rice into bowls; top with chili and cheese, avocado, and green onion. Note: leftovers can also be served over shredded lettuce with chips and diced tomatoes for a great taco salad.