Preheat oven to 450. Saute' sausage with the onion, 1/2 teaspoon fennel seed, oregano, basil and garlic. On the pizza crust spread a thin layer of mozzarella and a layer remaining items in this order, pizza sauce,sausage, diced tomatoes and kraut.
Sprinkle remaining fennel seed over kraut, top with remaining mozzarella and sprinkle with parmeasan. Salt and pepper to taste. Bake for 18 to 20 minutes.