Meanwhile, fill a large saucepan with 2,5cm of water, and set up a collapsible steamer inside. Bring the water to a boil, lay the asparagus in the steamer, cover, and steam until crisp-tender, about 2-3 mins (depending on thickness of spears). Rinse the asparagus under cold water until cool. Drain and add to the bowl with the pasta.
NOTE: See tips below for alternative method.
Serve and enjoy!
PS) Leftovers are perfect to pack up for lunch the next day.