I actually used a mix of 50/50 ground beef and chicken. I find it’s moister and lighter tasting than straight beef, and my family prefers it in all the ground meat recipes I make. If you can’t find mini gnocchi, absolutely replace it with regular-sized gnocchi. I prefer the small size in this recipe because you get more crispy edges. As always, use whatever variety of vegetables you prefer or have on hand. I would stick with tomatoes, though, as they give off juices that create a bit of a saucy base for the meatballs to cook in.