Grill pan (or something WITHOUT a flat bottom)
Heavy-guage aluminum foil
Regular aluminum foil
In place of 350 degree oven, line your grill pan with crinkled heavy-guage aluminum foil.
Use a casserole dish in which to cook your food.
Cover the entire casserole dish with either heavy-guage aluminum foil, or a cake pan with regular aluminum foil covering the cracks.
Resist the urge to peek, as you will loose valuable heat.
Keep a wet towl available in case the aluminum foil catches fire.
Find more like this: Grandpa's Use Only