Here is what I normally do, taken from a recipe post way back in 2013.
When I make meatballs, I cook them in a fry pan, and then add them to sauce, that I am cooking.
A lb or so of Ground Beef (at least 80 or above)
About a cup of bread crumbs (Italian seasoned) or plain. If plain, add some parsley.
If you want, substitute some Panko Bread Crumbs. (You can use both seasoned and panko, whatever you have in the house).
2 eggs
A splash of milk, for some moisture.
2 Tbl of Cheese (your choice) I used Kraft.
A bit of Pepper, to taste.
Fry in 2 Tbl of Olive Oil and brown on all sides. Drop into the bubbling sauce and cook for at least an hour or so.
What I did this time, since I had to preheat my oven, to make my bread. I placed them on a cookie sheet and baked them in the oven for about an hour. I did turn them along the way, but I don't think that is an absolute.
I had seen this technique on I Think I Can Cook's Tic Tock website, and figured I would utilize some unused oven time.
It worked out perfectly, and then I placed them in my sauce, that I was cooking for dinner.