How nice when dishes are decorated in a some nice way, right?!
So, my idea is to make water-lily! I will explain how:
You may take the following vegetables for it: garden radish,
black radish, kohlrabi. The vegetable's shape should be roundish. Cut it on the same principle as lily looks. It should have 5-6 petals. So, at first slightly cut peel in 5-6 even parts. Then the second layer cut in the same way and so we may have 3 or more layers. In the middle make some hollows and put in them some straws of carrot, to make stamens.

For clearness, I attached pictures, where you can see the process step by step!