Preparation Preheat the oven to 400°F. Set racks in the upper and lower thirds of the oven. Line two 13x18-inch baking sheets with parchment paper. In a small bowl, beat the egg with 1 tablespoon water. Prep the ingredients for the filling and set aside. If using a 17-ounce puff pastry package, roll each sheet to a 9x12-inch rectangle. Cut each piece lengthwise into eight 1 1/2-inch wide strips. Cut each strip crosswise into two pieces, about 4 1/2 inches long. You should have 32 pieces of pastry. Spread the center of each piece of pastry with 1/2 teaspoon mustard and top with 1/2 teaspoon sauerkraut. Brush one narrow end of the pastry with egg wash, add one piece of sausage, and roll to enclose. Return to parchment-lined baking sheets. Brush the top of each pastry with egg wash and sprinkle with caraway seeds, seam-side down. Chill in refrigerator for 15 minutes. Bake until golden brown and puffed, 23 to 27 minutes. Cooks' Note:If you are able to find all-butter puff pastry, such as Dufour (our preferred brand), roll the pastry sheet to a 12x18-inch rectangle on a floured surface. Cut pastry lengthwise into eight 1 1/2-inch-wide strips. Cut each strip crosswise into 4 pieces, about 4 1/2 inches long each (you should have 32 pieces of pastry), and proceed with the recipe.
Preparation Preheat the oven to 400°F. Set racks in the upper and lower thirds of the oven. Line two 13x18-inch baking sheets with parchment paper. In a small bowl, beat the egg with 1 tablespoon water. Prep the ingredients for the filling and set aside. If using a 17-ounce puff pastry package, roll each sheet to a 9x12-inch rectangle. Cut each piece lengthwise into eight 1 1/2-inch wide strips. Cut each strip crosswise into two pieces, about 4 1/2 inches long. You should have 32 pieces of pastry. Spread the center of each piece of pastry with 1/2 teaspoon mustard and top with 1/2 teaspoon sauerkraut. Brush one narrow end of the pastry with egg wash, add one piece of sausage, and roll to enclose. Return to parchment-lined baking sheets. Brush the top of each pastry with egg wash and sprinkle with caraway seeds, seam-side down. Chill in refrigerator for 15 minutes. Bake until golden brown and puffed, 23 to 27 minutes. Cooks' Note:If you are able to find all-butter puff pastry, such as Dufour (our preferred brand), roll the pastry sheet to a 12x18-inch rectangle on a floured surface. Cut pastry lengthwise into eight 1 1/2-inch-wide strips. Cut each strip crosswise into 4 pieces, about 4 1/2 inches long each (you should have 32 pieces of pastry), and proceed with the recipe.