The seeds are difficult to grind and much effort is needed. The finer the powder the better. Stir the brew frequently and allow to boil for about 20 minutes. More prepared acidic water should be added as needed to keep the liquid from completely boiling off. Then decant the brew and strain through a fine wire mesh.
Coffee filters are too fine, but cheesecloth, panty hose, or 'permanent coffee filters' work well.
Press the mush and try to squeeze out as much liquid as possible. This can be accomplished with cheesecloth or an old fashioned rag, like a cloth diaper. Boil the mush again in the prepared water and repeat the process for a total of three times. Combine the liquids and slowly simmer to a reasonable, drinkable amount. Observe the usual dietary precautions before drinking the brew.