How To Reheat Breakfast Casserole - I Test 5 Methods [Pics ...
Apr 21, 2022 Reheating breakfast casserole in the oven. To reheat a slice of breakfast casserole in the oven, preheat the oven to 350F (180C), cover with foil, and heat for around 10 minutes (less in a toaster oven). For an entire dish, let the casserole come to room temperature first and reheat it, covered, for 20 to 30 minutes in a conventional oven.
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