There are two options for re-warming these make ahead sandwiches: the oven or the microwave. Personally, I like using the microwave option because it is fast, but either works great. When re-warming in the microwave remove the sandwich from the foil and wrap in several paper towels. Warm for 30-60 seconds or until warm from the fridge. When rewarming the sandwich from the freezer, warm the wrapped breakfast sandwich in paper towels on the defrost setting for 3-5 minutes or until warmed through. Alternatively, you can re-warm the make ahead breakfast sandwiches in the oven. Preheat oven to 350 degrees F and place the sandwich on a cookie sheet or baking dish still wrapped in the foil. It should take about 10 minutes to warm from the fridge and 20-30 minutes if going from the freezer.