Can Broccoli casserole be cooked then freeze it and than thaw in about 4 days to reheat and eat in 5 days or can you leave in refrigerator for 5 days?

Sure, you can cook broccoli casserole, freeze it, then thaw and reheat it within 4 days. Or you can just leave it in the fridge for up to 5 days. Just make sure it's properly stored and reheated to enjoy those veggie-filled leftovers!