From San Giorgio
Ingredient measurements list quantities, but they omit how pasta starches behave when combined with dairy and tomato sauce inside a 13x9x2-inch baking dish. Undercooking the ziti by two minutes prevents the tubes from turning mushy as they absorb excess liquid during the 30-minute oven phase at 375 degrees Fahrenheit. Stirring the hot drained pasta directly with the ricotta, egg, and seasonings initiates immediate binding, ensuring the structure holds when portioned into ten servings.
Low-fat ricotta releases more water than whole-milk varieties, which can thin the sauce and compromise the integrity of the melted mozzarella topping. Thorough draining of the pasta and precise distribution of the 28 ounces of tomato sauce prevent a watery casserole. Covering the baking dish tightly with foil traps steam during the initial bake, allowing the interior to heat evenly without drying out the surface parmesan crust.
Assembling the dish ahead requires refrigeration for up to 24 hours or freezing for two months before baking. When adapting the recipe for different dietary needs, substitute the dairy items with plant-based alternatives at a strict one-to-one ratio while maintaining the egg binder to preserve the intended sliceable density.