COOK spaghetti as directed on package, omitting salt.

MEANWHILE, heat 2 Tbsp. dressing in large skillet on medium-high heat. Add shrimp, garlic and sesame seed; stir-fry 3 min. or until shrimp turn pink. Add vegetables, soy sauce and remaining dressing; stir-fry 3 min. or until vegetables are heated through. Remove from heat.

DRAIN spaghetti; place on platter. Top with shrimp mixture.