COOK spaghetti in large saucepan as directed on package.

MEANWHILE, heat dressing in large nonstick skillet on medium-high heat. Add meat and garlic; stir-fry 3 min. Add vegetables, broth and peanut butter; stir-fry an additional 3 to 4 min. or until meat is cooked through.

DRAIN spaghetti; return to pan. Add meat mixture and soy sauce; mix well. Spoon onto serving platter; sprinkle with cilantro.