Beef sirloin strips, marinated in soy sauce, rice vinegar, honey, ginger, and chile, then quickly stir-fried with green onions, chile, ginger, and garlic.
Steak fingers, if you're not familiar with them, are simply pounded, breaded and fried strips of beef. Yep, it's basically chicken-fried steak made into finger food, which is probably how they got the name...