Sometimes the obvious is so OBVIOUS, you can't see the Forest because of the Trees keep getting in the way.
Remember cooking 101, on a metal/steel flame heated griddle, has pores, i.e., can soak up / retain the grease (become seasoned) from both the burger's that are cooked, along with the sausage patties. Hence a "stoneware microwave egg cooker," can't compete.
I'm just a bagel (Toasted) & egg (over easy) & cheese (American or Swiss, depends on what's in the fridge) guy.
I do use a "microwave," but only to reheat (fast) period.
You want and enjoy taste, COOK the old fashion way, NO MICROWAVE'S.
Just a cranky 25 years Autobody /15 years welder (Ship and other things) / now a hobbyist machinist, i.e. all involve metal/steel.
I do have a cast-iron skillet, well-seasoned from use. The problem is keeping the egg shaped properly. Those round metal egg molds DON’T work....at least, they don’t work for me.
UNFORTUNATELY, MICROWAVES ARE EVERYWHERE AROUND US! IT IS IMPOSSIBLE TO COOK WITHOUT MICROWAVES!