Put the cooked, peeled and sliced beetroots into the hot broth
and simmer for 15 minutes. 5 minutes before the end of cooking, add
the bay leaf, allspice, black pepper and the half the onion.
Remove from heat and leave overnight or at least 6 hours.
Bring the borscht to the boil (from this point on, the borscht
can not be fully boiled, because it will start to turn
darker).
Set aside from heat then add the vinegar and strain.
Season with salt and pepper.
METHOD FOR THE DUMPLINGS:
Sift the flour into a bowl with the salt.
Put the butter in hot water and melt. Gradually pour it into
the flour, stirring everything with a spoon.
Combine the ingredients and place them on a floured board, then
knead the dough for 5 minutes until it is smooth and soft (the
dough will be very soft, so it's easy to knead it, but you can also
knead with a mixer).
Put the dough into a bowl and cover with film. Set aside for 30
minutes.
Divide into 3 equal pieces.
Roll the dough out thinly, 2 to 3 mm thick.
Cut into round discs then place a teaspoon of the filling on
the centre of the disc leaving a edge around to seal.
Fold over into a half circle, seal and crimp, then twist over
finger to create a dumpling. The most important aspect is to fully
seal the edges so they don't burst when cooking.
Using lightly floured hands pop the dumplings in a pan of
salted boiling water for 2 minutes or until they float.
TO SERVE:
Place the dumplings in warmed bowls and pour over the hot
soup.