Clean the asparagus, cut off the woody ends and, if necessary, peel the lower part, then cut into pieces 1-2 cm long, putting the tips aside.
Fry the asparagus pieces (without tips) in the olive oil in a pan (as high as possible). Pour in the broth and cream and simmer for 10 minutes, when the asparagus is done, puree in a saucepan or a suitable container. Season with salt and pepper, bring to the simmer again, add the asparagus tips and simmer for a few minutes until the tips are cooked through. Now carefully season with the juice of the orange - then do not simmer again!
Spread on plates, add a dollop of sour cream each, garnish with sliced smoked salmon, herbs and possibly orange zest.