Corn Salad with Grapefruit, Avocado, Dates and much more

This salad is as sweet as a refined candy, its colors (and flavors) are as balanced as in a still life. The ingredients' list is long and although everything is available in a single season, it is said to be missed out easily. There seems to be some truth in it because it took me until spring to get every ingredient together. It was so worth to catch up but imagine, you could have had it throughout the winter, too! To faciliate learning the ingredients' list by heart I made a shot of it :)
What you need for a

Winter Salad with Dates (by Alfred Biolek & Witzigmann, Unser Kochbuch, 2001):

1. corn salad, thin slices of endive and fennel

2. filets of grapefruit and orange, cuts of avocado

3. toasted almond splits, cuts of dates

4. for the dressing: zest and juice of lemon, zest and juice of orange, chives, white wine vinegar, mustard, honey (I took agave), olive oil, salt, pepper.