Cut the asparagus, the cauliflower and put it in a large pot with onion, garlics and two glasses of water.
Set aside the heads of the asparagus.
Cook at low heat for 35'.
In the meanwhile in a small pot put the rice with water, curcuma and salt, let cook at low heat for 20' or more so that it is dried.
When the vegetables are almost cooked, sieve all with a blender, add the heads of the asparagus and the vinegar, than cook for 10' more.
With the rice make small balls, and let cool at room temperature.
Pour the soup in a large dish, and add the riceballs.
Serve with a dusting of pepper, leafts of mint, and a little olive oil and the chives.