Heat oil in skillet on medium heat. Slice onion, add to heated skillet. Add garlic when onions become soft. Stir fry about 1 minute. Add shaved beef and brown stirring onions and garlic through meat, about 10 minutes.
When meat is browned, add gravy, cover and reduce heat to low. Simmer for about 10 minutes. If you have too much liquid, uncover to reduce liquid.