Easy Hamburger Casserole Recipe

Ingredients
1 lb hamburger
1 onion, chopped
1/2 bell pepper, chopped
2 garlic cloves, minced
4 cups tomato sauce
1 (15 ounce) can corn, drained
1 cup uncooked rice
1/2 teaspoon salt
1/2 teaspoon pepper
1 1/2 cups Velveeta cheese, grated or grated cheddar cheese