Combine ground meat, breadcrumbs, egg, minced onion or garlic, salt, pepper, and any desired herbs or seasonings in a bowl
Mix gently until just combined
Shape the mixture into evenly sized balls
Heat a skillet with oil over medium heat
Brown the meatballs on all sides
Transfer the meatballs to a baking dish or keep them in the skillet
Bake at 400°F for about 15 to 20 minutes, or until cooked through
Or simmer the browned meatballs in sauce over low heat until fully cooked
Check that the internal temperature reaches 160°F for beef or pork, or 165°F for poultry
Serve hot with sauce, pasta, rice, or bread