Simo and Cicci recommend

You can store the Potato and Broccoli Casserole either raw or cooked for up to 2 days in the fridge.

You can substitute mozzarella with other types of cheese like provolone or smoked scamorza.

You can also use raw vegetables, but we recommend blanching them first to ensure they cook evenly and don’t remain too crunchy or even raw (this is especially true for the potatoes).