Remove the stalk and green leaves from cauliflowers.
Cut them into medium-sized parts and put in fresh water for some minutes.
Preheat the oven.
Drain the cauliflowers, place them evenly on the trays and put in the oven. Cook following the parameters (see pdf).
After cooking, chill at positive temperature.
Steamed cauliflowers can be served as side dish or au gratin as garnish.