1 pound ground turkey1 small yellow onion, diced1/2 head of green savoy cabbage, finely chopped (or use premade coleslaw from grocery store)28-ounce can kitchen-ready diced tomatoes, or freshly diced tomatoes16-ounce can pureed tomato sauce1 package boil-in-a-bag brown rice5 large green peppers, whole Parmesan cheesemix of grated Italian cheeses, parmesan, mozzarella, provolone, asiago, Romanoolive oil salt