Some other recipe websites call out frittatas as freezer-friendly dishes, but I think the freezer dulls their flavor and gives them a rubbery texture. Eat it for dinner, then wrap the slices individually or put them in an airtight container, store them in the fridge, and use them as grab-and-go breakfasts and lunches for the rest of the week. Leftover frittata will keep in the refrigerator for up to 4 days.