OK, folks, here it is:
Put 8oz/250g cleaned wheat (make sure there is no grit or other foreign matter in the wheat) into a generous amount of cold water. Bring to the boil, then simmer until the grains are round and softened but not mushy. I use a pressure cooker, so cook for 30 minutes from the time pressure is reached, then cool the cooker and release the pressure. If cooking in a normal pot, bring to the boil, then simmer for between an hour and 90 minutes (I'm only guessing here, as I've only ever used a pressure cooker for it).
Strain the cooked wheat, then spread it out on a tray lined with a cloth, and allow to cool completely. Once the wheat is cooled, add:
1/4 cup packaged toasted breadcrumbs
1 cup chopped toasted almonds (either spread on a tray and toasted in the oven, or dry-fried) or walnuts
1/2 cup sesame seeds, toasted (as for the nuts)
Dash of cinnamon
1 cup raisins
seeds from one pomegranate (if available)
Mix it all well, then taste for sweetness. If necessary, add small amounts of sifted powdered sugar a tablespoon at a time - put the sugar into a small mesh sifter or tea strainer, and dust the kollyva, it's easier to mix it through - and keep tasting. The final sweetness should be only just noticeable.
A couple of times I've not had to add any sugar at all, because of the sweetness of the pomegranate and the dried fruit, so always taste first.
EDIT: Whoops! Please note amended quantity of wheat in color.