Finely chop garlic and chilies and place in a bowl. Add sugar, fish sauce, lemon juice and a bit of boiling hot water to melt sugar.

Place chicken thighs in large zip loc bag and add marinade sauce mixture. Place in fridge to marinate overnight

BBQ chicken at 225 deg farenheight for approx 30min, flipping every so often. Watch closely since the fat from the chicken will cause flare ups.