One way to take advantage of the fall's bountiful harvests is to make several casseroles that you can freeze and enjoy later in the year. Many food blogs and home cooks recommend investing in 8-by-8-inch glass Pyrex casserole dishes that have matching lids; it makes it easy to bake, cool, cover and freeze all in one container. But if the idea of spending more money on casserole dishes is less than desirable, try this instead: Make your own food blocks. Line a casserole dish with a few layers of parchment paper. Make your casserole in the dish, allow to cool and then freeze it. When the casserole is frozen solid, pop it out and wrap it in aluminum foil, then place it in the freezer. When you're ready to eat it, put it back into the dish and heat it up.