Chop the broccoli, onion and out in the pot. Pour 3dl of water, add the rest of ingredients and cook till it's soft.
When it is done, blend with the hand mixer, put it back on the stove and add milk, parsley, salt and pepper.
Once it is blended, it is ready to serve. this version is for a strict diet. If you are not following any diet program, at the end you can add a cooking cream (or sour cream), and also you can boil potato among other vegetables, to enrich the flavour.