Prepare the Vegetables:
Heat olive oil in a skillet over medium heat. Add onions, garlic, and bell pepper. Sauté until soft and fragrant.
Add the Leftover Chili:
Stir in the leftover chili. Add a splash of broth/water if it looks too thick.
Enhance the Flavor:
Mix in tomato paste (optional) for a richer, freshly-cooked taste.
Add the Pasta or Rice:
Fold in the cooked pasta or rice and combine everything evenly.
Melt the Cheese:
Sprinkle the shredded cheese on top. Cover the skillet and let it melt for 2–3 minutes.
Serve:
Spoon into bowls and add your favorite toppings such as sour cream, cilantro, or tortilla chips.