snap off and discard the bottom segment of each asparagus spear, then break off tips and set aside.
boil stems in salted water until tender (5-10 minutes depending on thickness), then scoop them out into a bowl using a straining ladle.
add tips to the same water and cook until tender (2-5 minutes), drain with straining ladle and set aside in a separate bowl - reserve the cooking water.
using an immersion (stick) blender (I use THIS ONE; U.S. option HERE), blitz the stems to a purée and add some of the cooking water to obtain a thick soup consistency - add seasoning to your taste and leave aside.
in a frying pan, heat up the olive oil, then add asparagus purée, salmon strips and cream.
cook for 1 minute, add a bit more of the reserved cooking water to loosen, and finally stir in the pasta.
let it all get nice and hot for 1 minute or so, adding a bit more cooking water if necessary (QK pasta is quite absorbent).
divide between two serving plates, sprinkle with nutritional yeast, and top with the reserved asparagus tips, before serving immediately.
Notes
You can replace the nutritional yeast with Parmesan cheese.
The best way to ensure accurate measurement of ingredients is with Metric Kitchen Scales. They are inexpensive and take up very little space. Click HERE for the ones I use. For U.S. option click HERE.