Beef stir-fry is a quick and easy dinner recipe that is perfect for busy weeknights. This dish involves stir-frying thinly sliced beef with a variety of colorful vegetables in a flavorful sauce. The beef becomes tender and juicy, while the vegetables retain their crispness. Serve it over steamed rice or noodles for a complete meal. Customize the sauce by adding your favorite seasonings and spices to suit your taste.