Old fashioned potato knishes
3/4 teaspoon baking powder
1/2 teaspoon salt
1 beaten egg
1/2 cup vegetable oil
1 teaspoon vinegar
1/2 cup water
Here is the filling we made:
2 onions chopped up in the food processor (next time I will use three)
A big bunch of parsley chopped up in the food processor
1 tablespoon of oil
2 tablespoon of butter
1/2 teaspoon salt
lots of pepper
an egg (or an egg white, or an egg yolk) for glazing
Put water on to boil as you scrub your potatoes and cut them. Put them in the coldish water, bring to a boil, and cook around 20 minutes. Meanwhile, start frying the onions over low heat in the salt, oil and butter. The longer, the better, we cooked ours almost half an hour, stirring constantly, but they could have cooked longer. Towards the end we added the parsley and pepper.
We each had a rolling pin. I divided the dough into four balls, he rolled out two and I rolled out two, as thin as possible, they came out about 18" long and about 4" wide. Along the long side we put a long log of filling about an inch tall, spread some oil on the still exposed part of the dough, and rolled the dough up so it wrapped around the filling almost twice.
Then you mash down on the filling about every 2-1/2 inches with your hand and where you mashed, pick up the end, twist where you mashed (like a sausage casing) and cut where you twisted. You end up with a little pillow twisted closed at both ends. Squish it around and put it with one of the twisted ends down on the baking sheet, then I pushed into the middle top (at the other twist) to make an indentation in mine but Paul didn't do that, so his are the ones that look sort of open at the top.
Beat the egg and glaze the knishes (we used our fingers). Bake for about 25 minutes at 375 degrees. This made about 25 knishes at the size you see in the picture.