COOK shrimp in boiling water to cover about 3 min. until shrimp turn pink. Drain and cool.
MIX vinaigrette, mustard and yogurt in large bowl. Add cooled shrimp, mango, bell pepper and avocado. Toss gently until coated. Chill.
SERVE on salad greens. If desired, garnish with fresh chopped cilantro or basil.