I suggest chili. It is nearly impossible to screw up, cheap to make, delicious/filling, and will last you a few meals. Just sweat the vegetables you like (I use onion, bell peppers, jalepenos) in a huge pot with some oil, then throw in the ground beef and brown that, and finally toss in a couple big cans of whole tomatoes which you have already crushed. Along the way you can/should add spices to make it your own like cinnamon, beer, garlic, chocolate, cilantro etc. Bring everything to a boil and simmer for an hour or so, then pour yourself a bowl and top with shredded cheese