You’ll Need:10 White Castle hamburgers, with onions 3 small zucchini, cut into 1/4-inch strips 4 tablespoons flour 8 ounces meatless spaghetti sauce 8 ounces ricotta cheese 1 egg, beaten with ricotta cheese Grated Parmesan cheeseDirections : Remove hamburgers and onions from the buns. Spread garlic butter on all the buns.