Place beef in a pressure cooker with 1 cup water and cook with pressure on High for 20 minutes.
Release pressure when finished.
Whisk soy sauce, vinegar, lemongrass, ginger, sugar, pepper, orange juice, and corn starch together and heat in a skillet.
Saute vegetables in a separate skillet with a tablespoon oil, cook on medium heat for 2 minutes.
Then place beef ribs into a sauce to coat them.
Serve over cooked rice with beef and vegetables on top and drizzle sauce on top.