INGREDIENTS
2 tbsp
extra virgin olive oil
1
small yellow onion, diced
2 cloves
garlic, minced
2 15 ounce cans
black beans, rinsed and drained
1
green pepper, seeds removed and diced
1
red pepper, seeds removed and diced
1 14 ounce can
crushed tomatoes
1 8 ounce can
tomato sauce
1 tsp
yellow mustard
2 tbsp
brown sugar
1/2 tsp
kosher salt
1/4 tsp
black pepper
1/4 tsp
crushed red pepper flakes
hamburger buns