I have know idea how long it will take, as I don’t do it myself, that and it is dependent on the power of your microwave.
Get a small Foreman grill and hide it from your RA. If my brother was able to hide a cat in his dorm room, you should be able to hide a Foreman.
Second, most schools I know have two cafeterias: One fast food crap and one all you can eat crap with a deli bar, breakfast bar, and an ice cream machine for the girls. Eat as much protein as you can there and smuggle out what you can. Hell, I haven’t been to my school’s cafeteria in 6 years, but I’m still using their forks.
If none of these things work, make up as many meals as possible at a friends/parent’s place on the weekend and then microwave it when you get home. This helps keep cost down and gives you an excuse to bring your laundry to mom’s.
A few thoughts anyway…