Add the panko bread crumbs to a large bowl, set aside
Spray a skillet with non stick spray.
Over medium heat, saute onion, salt, and pepper. Cook for 5 minutes, stir often
Add the minced garlic and cook for another 2 minutes.
Turn the heat down, add the milk and bring to a simmer. Once it comes to a simmer, pour it onto the panko bread crumbs and stir to combine.. The mixture will be thick. Set aside to cool.
In another large bowl, add the egg and beat. Them crumble ground beef over egg and add onion mixture. Mix well (the easiest way is to mix with your hands)
Form about 16 meatballs and chill in the refrigerator for 30 minutes
Once the meatballs have chilled, heat oil in a large skillet **** see below
Add the meatballs and cook until brown on all sides, about 15 minutes.
Transfer meatballs to a dish and set aside
**I baked my meatballs in the oven at 350 for 20 minutes, turning halfway through cooking time!