Cheesy Mexican Skillet Casserole

cooked rice (any variety, quinoa would be great too)

medium or large onion, diced

bell peppers, diced

ground beef (or turkey)

can of black beans, rinsed

can of diced tomatoes

packet of taco seasoning

sour cream or full fat greek yogurt

grated cheese, (I used cheddar)

jalapeno pepper, sliced (optional)

lime wedges & tortilla chips for serving (optional)