One of our new favorites is a recipe I got from my coworker--it's called Lasagna Toss.
1 jar spaghetti sauce (we like Prego roasted garlic and herb), 1 lb ground beef, 1 box of "no boil" lasagna noodles (about 8 noodles), 1/4 cup italian salad dressing, 1 3/4 cup water, mozzarella cheese.
Brown the ground beef in a big skillet, drain. Break the lasagna noodles into small pieces (1" or so). Add sauce, italian dressing, water, and noodles to the ground beef and boil, then reduce to a simmer. Cover, cook until the water is all
absorbed by the noodles and the noodles are tender. (You can use the standard "boiling required" lasagna noodles, just add 2 full cups of water--we've just found that the "no boil" ones come out more tender.) We usually get a 12oz block of mozzarella and
shred it ourselves, and sprinkle some on top--you could do a pre-shredded but it melts so much better if you shred it yourself! The italian dressing adds a little tang to it that's super yummy.
Here's another that DH brought from his family:
Taco Ring
You need: 1 lb ground beef; 2 cans of refrigerated crescent rolls (8 rolls in each); 1 pouch taco seasoning; shredded cheese (we like a mexican cheese mix); any other taco toppings you like.
Brown the ground beef, drain, and add the taco seasoning according to the pouch directions (maybe a little less water--you don't want it too watery). Stir in cheese until it's melty and cheesy enough for your taste. :) We usually do it
until it sticks together in spoonfulls. On a pizza pan or round baking stone, arrange the crescent rolls with the fat base in the middle and the points hanging off the edge of the pan--overlap them so you have a nice solid ring to put the meat on. We
usually wind up with 2 extra crescent rolls that can't fit into the circle for whatever reason. Spoon the meat onto that ring (you could add other toppings at this point if you want them) and then fold the points of the crescent rolls back over the
meat into the center of the ring... I found a picture to help illustrate:

Bake according to the instructions on the crescent rolls (until nice and golden brown.) Cut into sections and enjoy! :)