To make sauce: In a small mixing bowl combine satay sauce ingredients mixing well.
To make burger: In a large mixing bowl, combine mince, egg white, stock powder, garlic, ginger, Thai seasoning, and lemongrass. Use your hands to combine mixture well. Divide into 6 round shaped burger patties. In a large non-stick frypan that has been generously coated with cooking spray, fry burgers until cooked on both sides.
To assemble: Cut rolls in half, grill until toasted brown. Place salad on base of bun then top with burger and a sixth of the satay sauce, place lid on top.