Liz,
My meatballs and meatloaf recipe is the exact same thing , if you take your meatloaf recipe you can use to make meatballs, cook them and freeze them. I bake mine, but frying is fine. Then when I want to make meatballs and pasta, I pull the bag from the freezer and pitch them in the sauce. You can also use them to make lasagne...I rolls small ones for that. You can also use them in gravy and place on mashed potatoes.. Lastly I shape them into hamburgers and used them to make easy peezey meatball sandwiches on hard rolls. Kind of boring I know, But its easy and stores very very well, and has alot of uses.
One note on the Lasagne....It tends not to freeze well... It dries out.. the pasta will absorb the water from the sauce. If you freeze it be sure to use a more watered down sauce. The store bought frozen ones are acceptible I think because they are flash frozen ..Our freezers are too slow.. You might want to modify the plan on Lasagne.. freeze the fixings and use a store bought no boil lasgna strip...add strips , add frozen stuff and fresh sauce and pop it in the oven... You can make them small enough to have 2 meals...Its what I do here unless its a holiday or guests...then I Make it fresh.
I use the Barilla no boil ones here.. https://thatrecipe.com/blog/2013/05/20/no-boil-lasagna/ but use baby meatballs..not ground meat,
al