Brown ground beef and cook pasta al dente.
Spray the inside of a 4 - 6 quart Crock-Pot with non-stick spray.
Mix all ingredients in the crockpot except for ⅓ of the mozzarella cheese.
Place the remaining cheese on top of all ingredients.
Cover and cook on LOW for 3 - 4 hours. If cooked longer than 4 hours or on high, it may burn (THREE hours works perfectly fine in our crockpot).
