Italian baked cauliflower

Name: Italian baked cauliflower
Prep time: 1 h
Cook time: 30 min
Total time: 1 h 30 min
Cuisine: European, Italian, Mediterranean
Ingredients: 1 pound italian sausage; 1 cup diced celery; 1 cup diced onion; 1 cup diced bell pepper; 2 cups shredded chedder cheese; 2 cups mozzerella cheese; 1 cup aged white chedded cheese; 2.5 oz sliced black olives; 5 oz pizza sauce; 5 cups riced cauliflower