In a wok, heat the remaining 2 tablespoons of vegetable oil over high heat until smoking. Add the remaining 1 tablespoon of garlic and 1/4 teaspoon of salt; cook until golden, about 30 seconds. Add half of the meat and cook for 3 minutes without stirring; turn and cook 1 minute longer. Transfer to a plate; cook the second batch. Return the meat to the wok and stir-fry for 30 seconds.