You cut the beef up real fine, heat it up in the microwave for two minutes, cool, drain, set aside. For the white gravy, heat the oil in a large skillet over medium heat. Whisk in the flour, salt and pepper until smooth. Cook and stir over medium heat until browned, about 10 minutes. Gradually stir in milk so that no lumps form, and continue cooking and stirring until thickened. If the gravy becomes too thick, you may thin it with a little more milk. When gravy has thickened, remove from heat, add your corn beef, pour over already baked biscuits. Cook refrigerated biscuits for 11 minutes in stove at 350 degrees. Bon appetit! It was very delicious!