Once boiling, add asparagus the boil until just tender, about 3 minutes (a range of 2 1/2 minutes for thin spears and 4 minutes for thick spears).
Prepare a bowl of ice water. When the asparagus is cooked, immediately plunge it into the ice water for 1 minute. Then drain. Season with salt and pepper as desired. Refrigerate for up to 4 to 5 days.