To a small skillet, add the curry powder. Cook over very low heat for 1 minute, until fragrant, stirring often. (see note) Transfer the curry powder to a bowl and allow it to cool.
Add the ketchup to the curry powder and mix until well combined. Refrigerate for at least 1 hour to let the flavors develop.
Sausage Rolls
Preheat the oven to 400 degrees F. Line a baking sheet with parchment paper. Set aside.
Add the ground pork, apple, onion, basil, sage, salt, and pepper to a large mixing bowl. Mix until everything is well combined. Set aside.
Roll out the pastry onto a floured surface until it measures 16 x 9 inches. Divide the dough into four 4 x 9-inch rectangles. (Cut the dough in half and then half again so that you have four strips.)
Divide the pork sausage mixture into 4 equal parts. Roll each sausage portion into a log and place it on the dough rectangles, lining it up along the long edge.
Brush the egg wash down the right side of the pastry, across from the sausage mixture. Roll the pastry over the sausage, making sure the pastry overlaps the egg-washed side and is "glued" with the seam side down. Repeat for all the dough rectangles.
Cut each sausage roll into 6 equal pieces, for a total of 24 mini rolls. Arrange the pieces on the prepared baking sheet, being sure to leave space between each one.
Bake for 25 minutes until golden brown. Rotate the baking sheet halfway through the cooking time for even browning.
Remove the pan from the oven and transfer the sausage rolls to a platter. Serve warm with the curry ketchup.
Notes
Nutritional information is for the sausage rolls only. It does not include the curry ketchup.
Toasting the curry powder takes out the "raw" flavor.
You can leave the peel on the apple or peel it before grating.