I really love Shepherd's Pie. In my opinion it is the King of the Casseroles. It has everything you want: meat, veggies and starch, all in one place with a delightful gravy tying it all together. You can use any ground meat you want, and pretty much any variety of vegetables. You can top it with any kind of potato you want (wowza it's amazing with sweet potato). It's a great way to get a lot of nutrition in one easy place!
1-2lbs ground meat (beef, lamb, chicken, pork, turkey, whatever floats your boat)
1 cup stock (again, whatever kind you like)
Chopped veggies enough to fill your casserole dish
6 cooked and mashed potatoes
Grated cheese (optional)
Brown your meat in a saucepan. Add a slurry of flour and stock to build up a gravy right there in your pan. Put your meat and gravy in an rectangular oven-safe dish. Stir in your chopped up vegetables so they get nice and coated in the gravy too. Top with mashed potatoes and cheese (if desired). Cover with tin foil and bake at 400F for about 40 minutes or until it's warm all the way through. For the kids I like to take their serving and stir it up so they can't get picky and just eat the potatoes or something!