- Cut meatballs into quarters. In a large frying pan, saute the onion and bell pepper in oil over medium high heat until tender.
- Stir in meatballs and cook for 3 minutes. Stir in taco seasoning, tomatoes, and beans.
- Reduce heat to medium and simmer for 10 minutes, stirring occasionally and breaking apart tomato chunks.
- Spoon meat mixture over individual servings of tortilla chips. Sprinkle cheese over top and garnish with sour cream.
Variation: Meat filling can also be served burrito style in warm flour tortillas.