Add all the crust ingredients to a food processor and pulse on high until dough comes together in a soft ball. Press it into the bottom of a 9” round tart pan. Set in the fridge or freezer to chill for half an hour.
Preheat the oven to 375 F. Lay a sheet of parchment paper over the crust and a heap of dried beans, enough to cover the bottom. Bake the crust for 20 minutes.
Remove the beans and parchment paper, dock the bottom of the crust with a fork. Lower the heat to 350 and return to the oven for another 10 minutes.
Pour the curds in, alternating between the cranberry and the lemon. You have more of the cranberry so be a bit more careful with the lemon. Swirl them together.
Bake the tart for about 20 minutes, until only the center jiggles and the sides look matte.
Chill first at room temperature, for 10 minutes then in the fridge for at least 4 hours before serving.