For to make a dish of 30 eggs or 40 into one (big) egg, you must take
two pig's bladders, such that one of them is smaller than the other. Wash
them out carefully inside. Then take the eggs, remove the shell, and separate
thewhite from the yolk. Take the small pig's bladder, mix the yolks and
put them into the smaller bladder, so that the bladder is full. Tie the
bladder up carefully and give it into a pot. Let boil, until the yolks
get firm. Then put off the bladder from the yolks. Take the bigger bladder
and cut a little hole in it, so that one can put in the big yolk. Then
you must sew up this hole of the bigger bladder with the (big) yolk within.
Then you have to mix up the white of the eggs. Take a funnel, put it into
the opening hole of the bigger bladder and put the white of the eggs upon
the yolk within the bigger bladder, so that the bladder gets full. Tie
it up, put it into the pot and let boil once more. The white of the eggs
will boil around the (big) yolk, and there will be one big egg. You can
serve it with a sauce of vinegar.