Heat oil in large skillet on medium-high heat. Add shrimp; cook and stir 2 minutes or just until shrimp turn pink. Remove shrimp from skillet. Set aside.
Stir vegetables into skillet. Cook and stir 4 minutes or until tender-crisp.
Return shrimp to skillet. Add marinade and pineapple chunks; cook and stir 2 minutes or until heated through. Serve over cooked rice, if desired.