This sweet and tart cranberry raspberry tart has a buttery crust and a spiced and flavorful filling thats packed with bright berry flavors.
In a medium-sized saucepan, combine the raspberries, cranberries, orange juice, sugar, cinnamon, nutmeg, cloves, and salt and bring to a boil over medium-high heat. Reduce heat to medium-low and continue to cook, uncovered, until the mixture has thickened slightly, the cranberries have burst, and the raspberries have disintegrated, about 25-30 minutes. You can use the back of a wooden spoon to press the cranberries against the sides of the pot to help them burst and release their juices.
Stir in sifted cornstarch, vanilla extract, and orange zest and remove from heat. Allow the filling to cool to room temperature (DO NOT put hot or warm filling in the tart. Be patient and wait for it to cool!)
Preheat the oven to 375 degrees Fahrenheit. To make the top crust, roll out the second piece of dough until it is 1/8-inch thick. Cut the dough into a 10-inch square, and then use a cookie cutter to cut some festive shapes out of the dough (this will allow you to see the filling underneath).
Bake until the crust is golden and the filling has thickened and is bubbly, about 35 to 45 minutes. Remove and allow to cool for 1 hour before slicing and serving.