Here is an easy idea I got from my old room-mate Tali. She made these all the time and it seemed like we waited for eternity at the oven door for them to cook... but oh when we pulled them out! Heavenly! Too speed things up a bit- I actually cooked my meat in some chopped onions first, but it tastes really good cooked in the oven if you are willing to wait.
Tali's Tin Foil Dinners (Oven Style) ground Beef Onions Potatoes Carrots Salt and Pepper Whatever else you want to throw in. *Literally chop and throw into some tin foil. (The thinner you cut the faster it cooks) Wrap in up and throw it in the oven at 400 for 30 minutes if you previously cooked the meat and about 1 hour if you haven't. Enjoy!