Slice the flank steak in slices ⅛” wide going across the grain.
Cut those slices in half.
Heat an iron skillet over medium-high heat.
Add the beef with garlic and red pepper.
Remove the strips when the meat is medium-rare (145 degrees F.)
In the same skillet add the green onions, oyster sauce, and ginger cooking for 2 minutes.
Add the beef back to the skillet with the corn and water chestnuts.
Slice the orange in half. Squees ½ into the meat mix, then portion out the rest to cook in bite-sized morsels.
Serve over rice.