This spinach casserole has all the delectable lusciousness of creamed spinach, but with much less cream and calories--plus you can actually taste the spinach! You can use either frozen or fresh spinach here--use 3 packages of frozen, or use 32 ounces of fresh and blanch it--but note that you should have about 3 cups of spinach after it’s thawed or blanched, chopped and squeezed dry. To thaw spinach quickly, defrost it in your microwave or place it in a fine-mesh strainer and run it under cool water, breaking up icy chunks. Leftover casserole tastes great, especially with a fried egg on top.