Raisin and Walnut Jam Tart

For the Pastry Dough

• 2 cups all-purpose flour
• ¼ cup sugar
• ½

To make the dough by hand: In a medium bowl, combine the flour, sugar, and baking powder, if using. Add the oil or butter, egg yolk, and vanilla and stir to make a soft dough. To make the dough in a food processor: Combine the flour, sugar, and baking powder, if using, in a food processor. Pulse in the oil or butter, egg yolk, and vanilla until the dough just comes together. If using butter, wr