Combine all ingredients for sauce in a bowl and mix, set in the fridge to chill.
Combine turkey meat, onions, green onions, panko, cumin, s&p and egg in a bowl and mix until combined well. (I used my hands for this part)
Mold the mixture into small patties. (slightly bigger than your bun because they will shrink a bit when cooking)
Grill the patties on Med-high heat for about 3-4 minutes on each side, or until cooked completely through.
Optional step, split your buns open and butter them slightly, stick them in the oven for about 3 minutes.
Add your burger, sauce, and any other fixings and enjoy!