Top sirloin is a good choice for stir-fry meat because it is a lean, tender cut of beef that is also relatively affordable. It comes from the hindquarter of the cow, just below the tenderloin, and has a good amount of marbling and flavor without being overly fatty.
    When sliced thinly against the grain, top sirloin steak is tender enough to be cooked quickly in a stir-fry, while still holding up well to the high heat and frequent stirring that is required for this cooking method. The meat's natural flavor also pairs well with a variety of Asian-inspired seasonings and sauces commonly used in stir-fry recipes.
    Overall, top sirloin is a versatile and budget-friendly choice for stir-fry meat that can deliver great flavor and texture when prepared correctly.