Mix the Worcestershire sauce, garlic, and Italian seasoning together in a small bowl and refrigerate.
Form meat into 4-ounce patties.
Season each side with salt and pepper.
Saute onions in olive oil to the consistency you prefer. Salt and pepper while cooking. Remove from pan and set aside while cooking the burgers.
Add burgers to the skillet and cook for 4-6 minutes on the first side. Turn and baste the first side with the sauce. Cook 4 minutes on the second side, turn and baste the second side.
Add a slice of cheese, if using.
Place each burger on a bun and top with sauteed onions. Enjoy!