In a small bowl, add your ground meat and onions.
Add your seasonings and mix well.
Take half of the meat mixture and form a patty. Add the mozzarella wheel on top.
Top the mozzarella with the remainder of the meat mixture, sealing the edges. Place the burger on a plate, and season on both sides with salt and pepper, optional.
Heat a grill pan, skillet, grill, or George Foreman, spraying the pans with cooking oil before adding the meat to the grill. Cook burger for several minutes on each side until done.
Remove to a plate, and top with warm marinara sauce.
