This tart ticks a lot of boxes. A chocolate-based dessert for the festive season, as well as one that’s pretty enough to take centre stage, but not so rich that you can manage only one slice. Puddles of spiced cranberry sauce are baked into the chocolate frangipane for a pairing that puts any surfeit of cranberries to good use. Get ahead by making the sauce and pastry beforehand, then finish it all off on the day you serve.
