Easy Chicken Chili

olive oil

1 tsp

onion

½ medium, chopped

garlic

1 clove(s), minced

canned tomatoes with green chilis

1 cup(s)

canned kidney beans

½ cup(s), drained and rinsed

cooked skinless boneless chicken breast

4 oz, torn

table salt

⅛ tsp, or to taste

black pepper

⅛ tsp, or to taste