SOUTHWESTERN COWBOY TATER TOT CASSEROLE!! Best Recipe Ever!

1-2 lbs ground beef 1 1/2 med onion 2 bell pepper 1 tsp minced garlic 1/2 tsp chili powder 1/2 tsp cumin 1/4 tsp black pepper 1/4 tsp salt 1/3 cup sour cream 16 oz Ro-tel 1 can pork n beans 1 can corn (drained) 2 cups shredded cheese 1 32oz bag tater tots