Step 1

Preheat oven to 375°F

Step 2

In a medium pan over medium heat, brown ground beef

Step 3

Add onions, stir, and cook until onions are soft

Step 4

Stir in spaghetti sauce, corn, kidney and black beans, salt, and taco seasoning

Step 5

Add water and stir

Step 6

Reduce heat and simmer about 15 minutes

Step 7

Add the cheese; stir until melted

Step 8

Pour into a greased 8 × 8-inch baking dish or pan that can go in the oven

Step 9

For the topping, in a small saucepan, combine water, salt, and cornmeal

Step 10

Stir

Step 11

Bring to a boil, stirring constantly, and cook until thick

Step 12

(Watch carefully, so it doesn't burn

Step 13

) Remove from heat and stir in butter

Step 14

Spread cornmeal mixture evenly on top of casserole

Step 15

Bake uncovered for 30 minutes

Step 16

Serve immediately topped with dollops of sour cream