Potatoes
Boil the potatoes in salted water for approx. 20 mins. Add the asparagus for the final 3 mins. Drain and rinse briefly under cold water.
Vinaigrette
In a large bowl, mix the mustard with all the other ingredients up to and including the pepper.
Salad
Add the potatoes, asparagus, radish, chickpeas and radish sprouts to the vinaigrette, mix.