A good Yonah Schimmel recipe for knish is Yonah Schimmel New York City Knish, which calls for potatoes, butter, onion, chicken broth and phyllo dough. Another knish recipe uses coriander seed, onion, chili flakes, vermouth and lemon juice.
To make Yonah Schimmel New York City Knish, boil and mash 6 medium russet potatoes. Heat 1 1/2 tablespoons of butter in a skillet, and saute 1/4 minced onion until tender. Stir in the mashed potatoes, 3 tablespoons of chicken broth, 1/2 teaspoon of salt, 1/8 teaspoon of ground black pepper, and chives or pepper flakes to taste. Add another tablespoon of butter.
Divide 6 sheets of phyllo dough in half, and cut each 3-sheet stack in half. Dollop the potato mixture evenly between the 4 phyllo dough sections, and roll the phyllo dough closed over the filling. Wrap the dough in a circular shape, and then brush melted butter over the top of the pastries. Bake the knish at 375 degrees Fahrenheit for 30 to 40 minutes.
To make another recipe, saute 2 cloves of minced garlic along with the onions in olive oil or butter. Once the vegetables are tender, add coriander, mustard and caraway seeds to taste. Cook the onions until they break down, and add a squeeze of lemon juice and a splash of vermouth. Combine the onions with the mashed potatoes, and roll the mixture in the pastry dough. Brush the knish with melted butter, and sprinkle the tops with poppy seeds.