1 tablespoon Vegetable Oil
1 pound Skinless Boneless Chicken Breasts, cut into 1-inch pieces
3 cups Vegetables, assorted cut-up (bell peppers, tomatoes, carrots)
1 can (8 oz) Pineapple Chunks in Juice, drained
1/2 cup Sweet-and-sour Sauce
Chow Mein Noodles, if desired