Extra Quick Chili

1 bag frozen onions and peppers
2 garlic cloves, minced
1, 28 oz. can plum tomatoes, undrained, chopped
1 tsp. bouillon granules
1 tsp. chili powder
2 tsp. cumin
pinch cayenne, or to taste
2 cans kidney beans or black beans, undrained
cooked whole grains (optional)

Combine all ingredients in a large pot, bring to a boil and simmer for 5 - 10 minutes. Serve over the whole grains of your choice, if desired.