Combine ground meat, eggs, bread crumbs, ketchup, milk, onion, garlic powder, Worcestershire sauce, salt, and pepper in a big bowl.
Separate the meat mixture into the muffin tray. Put ketchup on each one.
Cook in the oven for 20-25 minutes until done (internal temperature 71°C).
Wait 5 minutes before taking out the cans.
Enjoy it warm with ketchup.
Have a great time eating your favorite starters with small meatballs for a tasty and healthy meal.