Asparagus stalks can vary greatly in size. Some are no thicker than a pencil, while others are more than ½" thick. It's important to note that the cook time is reflective of the size of asparagus used. As long as the asparagus is cooked tender-crisp on the stove top (for thin stalks, this is 2-3 minutes, for thicker stalks, this can take closer to 5 minutes), the broil time in the oven will remain the same.