Beefy Taco Casserole

Ingredients

• 1 lb. 93% lean ground beef

• ½ yellow onion, chopped

• 2 white mushrooms, finely diced

• ½ bell pepper, chopped (red, yellow, or orange)

• 1 (16 oz.) can low-sodium black beans, rinsed and drained

• 1 (16 oz.) can unsalted diced tomatoes, drained

• 1 (4 oz.) can diced green chilies 

• 3 Tbsp. reduced sodium taco seasoning

• 7 small corn tortillas

• ¾ cup light sour cream

• ½ cup shredded cheese

Optional Toppings

• Lettuce and tomato

• Salsa

• Guacamole