Preheat oven to 350 degrees F. Sauté onion, bell pepper, and celery in butter. Process tomatoes and crumbled bread in your blender. In a bowl add sautéed vegetables to the processed tomato-bread mixture. Stir in 1 1/2 cups grated cheese, shrimp, and all of the seasonings. Pour the mixture into a greased 1 1/2 quart casserole dish and top with the 1/2 cup grated cheese. Bake in oven for 30 minutes or until bubbling. Serves 8.