Beef stir-fry with vegetables is a classic and versatile dinner recipe. Thinly sliced beef is quickly cooked with a medley of colorful vegetables in a flavorful sauce. The key to a successful stir-fry is to have all the ingredients prepped and ready to go before you start cooking. The beef should be tender and the vegetables should be crisp-tender. The sauce should be well-balanced, with a perfect combination of savory, sweet, and tangy flavors. Serve this dish over steamed rice or noodles for a satisfying and healthy meal.