One of my favorite things to cook for my hubby is a giant batch of mini hamburgers. I usually use rolls from the day-old bread rack at the grocery store. These I got in 2 packages of 15 for $1.50 (so 10-cents a roll). Then I get lean hamburger in a 3lb package (about $5), and make about 30 mini burgers (total cost = 27-cents per burger!!)
To make them, you start with 1 lb of hamburger meat and you squish it into a baking pan. The best way to do this is to use a small, flat-sided glass (or mini rolling pin) and roll it out in the pan so that its flat, and solidly one piece. You don't want it more than 1/2" thick. Thinner is okay as it will shrink and get thicker. Sprinkle with onion powder and a little bit of pepper (this is a VERY important step!)
Bake them in a preheated 350* oven for about 15-minutes or until the meat is cooked through. When you take it out, it may have separated some, but that's okay - you can work around it.
Chop the burger into squares that will fit on your rolls (should get about 10). Cut your rolls in half and place burger on roll. Stick in a baggie (or wrap in foil) and freeze individually.
Repeat this process 3x and you have a hamburger for every day of the month. Perfect, cheap, lunch.
For sack lunches, snag one and you have a DELICIOUS main course that will thaw and be ready for microwaving/eating by lunch time! (Hubby just sticks his in the dash to cook in the sun, but I do not know the food safety of this, so I would recommend reheating a more traditional way, lol. Also be sure to pack with an ice pack.) You can of course add toppings like you would on any hamburger. My favorite is lettuce, a bit of onion, a slice of fresh tomato, some mozarella (melted on the hot patty), and crisp pickles. YUM!
My kids love them too!