Heat oil. Pat beef with paper towel, mix with salt and corn flour until completely coated

When the oil is hot add beef and fry until beef is cooked and crispy. Set aside

Mix orange juice, orange zest, sugar, soy sauce, garlic, ginger and rice vinegar, whisk set aside

Add onions and red bell pepper to pan, fry until soft

Pour the soy orange sauce in the pan bring to boil until slightly reduced

Add in the beef and stir fry until sauce is thick

Serve with rice