This grill cheese sandwich was done with the speed cook feature. All you need to do to get the "oven" ready is remove the normal rotating glass dish and replace it with the included Teflon coated metal one. Put the sandwich directly on the Teflon dish. Close the door. Then, turn the dial and press at each sub-menu: cook by food > sandwich > grilled sandwich > cheese > 1-2 sandwiches.
It takes 14 minutes to cook one or two sandwiches, by combining four cooking methods: microwave, convection oven, upper element and lower element. There's a black box in there somewhere that mixes the four cooking methods differently depending on the food selected.
Once I pushed the start button for this sandwich I sat down and worked on my computer until the bell went off. You can't do that while grilling in a frying pan!