Slice bell peppers and pineapple into strips and chunks that are all about the same size. Set them aside.
Place olive oil in a skillet, cook steak until it is an internal temperature of 123°.
Remove the steak from the skillet, place it on a cutting board, cover it with a piece of foil, and let it rest while you prepare the sauce.
Follow the directions on the gravy package and make the gravy in the same skillet that you used to cook the steak (don't clean the skillet because you want the cooked beef flavor in the gravy).
Add the soy sauce and peppers and let the gravy simmer uncovered for 3-5 minutes.
Slice the cooked steak into thin strips. Add the steak strips to the gravy.
Add the pineapple and simmer uncovered for 10 minutes.
Serve over cooked white rice.