Add drizzle of olive oil in a wok or medium skillet. Add the peppers and onions; stir just until peppers are softened and onions appear translucent. Remove from pan and set aside.
In a wok or medium skillet add a drizzle of olive oil. Heat it over MEDIUM heat. Add shrimp and stir fry until no longer pink.
Add the vegetables into the pan with the shrimp; add the drained pineapple chunks and the sauce. Heat for about 3-5 minutes, stirring frequently, over LOW heat until heated through.
Serve over rice and enjoy! Sprinkle with red pepper flakes, if desired.