Preheat oven to 350 degrees. Cook vegetables according to package directions. In a large bowl combine shredded chicken, cooked stir fry vegetables and rice. Stir until combined. Add almost all of the teriyaki sauce {reserve a couple of tablespoons to drizzle over the top after baking} and the pineapple, mix to combine. Pour mixture into a greased 9x13 {or 12"round} baking dish and bake for 20-25 minutes or until mixture is hot and bubbly. Remove from oven, drizzle with remaining teriyaki sauce and sprinkle with sesame seeds. Serve immediately. Refrigerate leftovers for up to 5 days.
Notes
*If you want some heat, add 1/4-1/2 teaspoon of crushed red pepper flakes to the teriyaki sauce.