Sauce Preparation:
Put olive oil in a hot pan, add sausage and brown, breaking up meat with spoon, remove and strain excess fat and reserve. In same pan add onions and peppers and garlic, sauté until slightly browned.  Return sausage to pan, add crushed tomatoes, and oregano, simmer for 15 minutes, add salt and pepper to taste.

Polenta Preparation:
In a deep pot, bring liquid to a boil. Slowly whisk in polenta, lower heat and let simmer for 30 minutes, stirring frequently with wooden spoon. When cooked, stir in parmigiano, and butter. Salt and pepper to taste. Then pour hot polenta into ½ sheet pan, smoothing with a rubber spatula. Place in refrigerator and let firm up completely.

Assembly of Pizza:
Spoon and spread thin layer of sauce evenly over cooled and firm polenta in same sheet pan. Top with mozzarella and parmigiano and drizzle of olive oil. Bake in oven until cheese is melted and starts to bubble.  Let cool for 5 minutes and slice like pizza.

Suggestions:
You can also use sliced pepperoni instead of sausage, or both. Be sure to add pepperoni last with mozzarella cheese. You may also substitute and add any vegetables you like.

Buon Appetito!