I don't have a casserole recipe, but you could make a lasagna. When I make it I do two at a time each in a small casserole dish. We eat one and freeze the other.
This is not a casserole recipe either, but it is one of my favorite dishes using ground beef.
Lumpia Innards (we call it that because it is just the insides of lumpia which is similar to an egg roll
Cook your ground beef. While it is cooking add chopped onion and bell pepper. After the meat is cooked you can add minced garlic, sliced carrots, cut fresh green beans. Add a little soy sauce and water and put the lid on to cook for a little while.
When the veggies have started to soften, then add chopped cabbage. Put the lid on and continue to cook.
Sorry I can't give exact measurements. I usually do around a pound of beef and just chop up a bunch of veggies. Don't put too much soy sauce and make sure to taste as you go. If you like "juice" then you can add more water.
When all your veggies are cooked to your liking (green beans take a while) then scoop it on top of some fresh cooked rice. And for an extrra special treat, add bean sprouts. So delicious!!!!! Then you don't have to worry about your veggie side for the night :-)
I made it yesterday, but didn't have a lot of veggies so it was just carrots and green beans...not as delicious but not have bad.