mix water and sourdough starter until the starter is disolved

add flour and mix in the mixer for about 15 minutes after the dough comes together into one ball- the dough must be very stiff but silky smooth at the same time.

set the dough to rise for about 12 hours

roll out the dough to about 1/2 inch thickness and cut the bottoms of prosphora with a 2 3/4 inches round cookie cutter, placing all the bottoms into baking sheet to rise for about 30-40 minutes.

kneed the remaining dough, form a ball and then roll out to about 1/4 of an inch thickness

cut the tops of prosphora with a 2 inch round cookie cutter, match the number of tops to the number of bottoms

using a prosphora seal, press into each top the seal so that bears clearly the imprint of the lettering (or some times and icon) and let the tops rise for 15-20 minutes.

once the dough rested/risen for about 30-40 minutes place the tops of the prosphora over the bottoms with the imprint facing up - be generous when spraying your prosphora with water (see the video above)

pierce each prosphora with a wire (unfolded paper clip) in the form of the cross + as many times as you thing there is need for - piercing the prosphora helps to control the "oven spring" so that it rises equally when it is baking in the oven

bake at 550℉ for 12 minutes, checking and spraying your prosphora with water half way

(NOT IN THE VIDEO) To cool your prosphora - set it on the cooling rack then cover it with a dry towel, a wet towel and again with dry towel. Allow to cool for 3 hours before freezing.