HEAT oven to 400ºF.
MIX turkey, 3 Tbsp. peanut butter, onions and 1 Tbsp. soy sauce until well blended; shape into 20 balls. Place in 15x10x3/4-inch pan.
BAKE 15 to 20 min. or until done. Meanwhile, mix remaining peanut butter and soy sauce with water and dressing until well blended.
SPRINKLE meatballs with sesame seed. Serve with sauce.
