団子
They have a long history. In ancient China they were called 「団喜」.
Types:
For tea, the 花見団子 and the 月見団子 are most important. The colours of the 花見団子 could represent a cherry blossom viewing party: Sitting on the green grass, breathing the the fresh (= white) air under the pink blossoms.
For summer festivals, the みたらし団子 is very famous.
まゆ団子 (cocoon type), usually made on the 14.1 at home. They can be pierced onto a willow (or similar), representing a prayer for good (silk or rice) harvest.
There are also some for 二十日・鬼の目・草・彼岸 (for the equinoxes)・八朔 (on August 1st), but they all look the same (I think).
Normally, they are quite big (about 20 gr per ball), so it's almost a meal. However, for the tea setting, I think it's better if they are about 10 gr per ball.
It's always 4 balls, unless it's the 花見団子
Basics
みたらし団子
A bit difficult to serve in a tea setting elegantly, but you could serve the たれ separatedly as a “dip”.
Because the たれ is so sweet, there's no need to sweeten the dough itself, I think.
For the たれ:
Grill 団子 and dip!
花見団子
⚠️ This is an old recipe that I took from Argyi. In my course notes I have a new recipe that is simpler and that I'd use next time. Adding soy milk is a nice idea, I guess.
Pink and green dough (15 pieces each):
82 gr 上新粉
19 gr もち粉
6 gr potato starch
76 gr sugar
100 gr water
Mix, steam in cloth for 15', knead in baking sheet. Divide, then mix in rinsed chopped 塩桜 in one half and blanched 蓬 in the other. Form balls, wetting your hands slightly, steam those again for 5'.
White dough (idea with the soy milk from Argyi):