Combine ground turkey next 7 ingredients (garlic through sugar) in a medium bowl.
Mix well so that all ingredients are fully incorporated. Let mixture stand in the refrigerator for an hour to set.
In the meantime, prepare rice vermicelli noodles according to package instructions (usually just cover with boiling water.)
Wash lettuce, tomato, cucumber and fresh herbs. Place everything on a big platter.
Ten minutes before serving, pre-heat grill to high.
Form meat into meatballs and thread on bamboo skewers.
Grill for 3 minutes per side or until fully cooked.
Serve meatballs as little tacos in the lettuce and dip into the prepared fish sauce. Alternatively, you could create a noodle bowl and add the meatballs and chopped vegetables before tossing with prepared fish sauce.