Add butter and chopped vidalia onion ( you can use any onion; I prefer sweet ones) to frying pan and cook until onion for a couple minutes on medium heat. Add chopped garlic and 1/2 teaspoon salt and cook until onions start to get a tad brown on edges . Take off heat and put into small bowl to let cool down while mixing turkey.
In a medium to large bowl add ground turkey and egg white . Mix with hands until combined. Add onion mixture (butter and all!) along with the rest of the ingredients and mix with hands until combined . Form into 4 balls and slightly squish down to make a patty form . (I made 4 burgers with 1 pound of turkey). You could freeze at this point if you wanted to, and I did with two of them for later use.
On a metal grate tray covered with non stick aluminum foil (did not put meat directly on grill grates , although you could ) place burgers on metal tray and onto an already heated medium grill . I flipped burgers every 5 minutes for a total of 15 minutes of cooking. Grill is shut while grilling . .
They turned out.
Grate! ( Pun intended!).
I was surprised at how flavorful and juicy they turned out. I had very thick shredded jack and sharp cheddar cheese and I think that makes a difference along with using a cooking surface that the cheese and drippings can’t go through , hence me using the non stick foil on grate and not directly on grill.
Served bunless (for me )with sweet potato tots and a fresh green salad. Husband ate with bun and no toppings. :).