Black Bean Tacos

1 tablespoon olive oil

1 small onion, chopped

1 (15 ounce) can black beans, rinsed and drained

1 (7 ounce) can green salsa (salsa verde)

½ teaspoon garlic powder

½ teaspoon chili powder

½ teaspoon ground cumin

6 taco shells

2 ounces shredded Mexican cheese blend

1 tomato, diced

1 avocado, sliced

1 cup shredded lettuce

Heat olive oil in a saucepan over medium-low heat; cook onion in hot oil until tender, about 5 minutes. Stir black beans, green salsa, garlic powder, chili powder, and cumin with the onion. Reduce heat to low and cook the mixture at a simmer until it thickens, 5 to 10 minutes.

Serve with taco shells, Mexican cheese blend, tomato, avocado, and shredded lettuce.