Peel the garlic, ignore it if you don’t like it, wash and slice the bell peppers, add garlic to the hot oil in the pot and stir-fry until the garlic is fragrant, add beef tenderloin Stir-fry, add cooking wine, oyster sauce, monosodium glutamate, and colored pepper pieces after they are dispersed, stir-fry, add a bowl of water and simmer until the juice is reduced and remove from the pan.