If regular Italian—or Genovese—basil is all you have growing in your garden, it'll work fine. However, it's worth searching out a few extra varieties, such as purple, Thai, or lemon basil. Using a mix of varieties improves the salad by adding visual interest and nuanced flavors. If you can't find hanger steak, substitute flank instead.
View Recipe: Spicy Basil-Beef Salad