Yes - warming up the cold ones is what they do at the fast food breakfast places like McD and Subway. Subway does it wthl a patty of egg whites as well. You could do a week's worth on Sunday for all your weekday breakfasts. Just reheat gently in the MW. I have been having good success with lots of items using wax paper. It is cheap. Tear off a piece, lay down the egg patty on one side, fold over, twist ends like salt water taffy

and nuke for maybe 20 seconds and let sit a few more seconds to allow heat distribution. Check and do more if needed.