How far in advance can eggplant parmigiani be prepared?

Eggplant Parmesan can be prepared in advance and stored in the refrigerator for up to 2-3 days before baking. Alternatively, it can be assembled and frozen for up to 3 months; just ensure it's tightly wrapped to prevent freezer burn. When ready to cook, thaw it in the refrigerator overnight and bake as directed. This makes it a convenient dish for meal prep or entertaining.