Three Bean Tacos

1 tsp. olive oil
1 cup diced onion
1/2 cup diced red bell pepper
1/2 cup diced green bell pepper
1 Tbsp. chili powder
2 tsp. dried oregano
1 tsp. ground cumin
1 garlic clove — minced
1 cup canned chickpeas (garbanzo beans), rinsed and drained
1/2 cup canned black beans, rinsed and drained
1/2 cup canned pinto beans, rinsed and drained
OR 1 can of 5 bean mixture, rinsed and drained instead of all the other beans
1 (8-ounce) can no salt added tomato sauce
12 taco shells or tortillas
shredded lettuce, diced tomato, grated cheese, salsa

Heat oil in a large nonstick skillet over medium-high heat until hot. Add onion and next 6 ingredients (onion through garlic), and sauté 2 minutes. Add chickpeas, beans, and tomato sauce. Bring to a boil; reduce heat, and simmer 20 minutes or until thick. Prepare taco shells according to package directions. Spoon 1/4 cup bean mixture into each taco shell. Top each with lettuce, tablespoon tomato, cheese, and salsa.