Add all ingredients EXCEPT THE OLIVE OIL to a large bowl. Use your hands to combine ingredients.
Form into four patties. If you're not grilling immediately, place the patties on a plate and cover with plastic wrap in the refrigerator. (Ground turkey is very soft and it will firm up the refrigerator. Don't let it sit out any longer than necessary).
Heat the grill to medium-high heat.
Brush olive oil on both sides of each burger.
Gently place each patty on the grill.
Sear until brown, about 5 to 6 minutes. Do not flip your burger too early or it will fall apart. When it's sufficiently browned on one side, flip. Sear remaining side until browned and the patty is cooked through, another 5 to 6 minutes. Remove from the grill and serve!