As I was saying before, I like to cook double amount of meatballs and, in order to be quicker, I use 2 large pans for frying.
Meatballs can also be baked in the oven, but I think they won't be as tender and juicy. For example, my mom cooks them in the oven, on the pan lined with baking paper - but it's her oven which makes meatballs brown quickly and doesn't dry them off. Even though I have a fancy oven, I still couldn't find how to bake meatballs quickly and without drying them off.