The key to success is reducing the quince and cranberry paste far enough that the pectin found in the quince will gel up and keep its shape when cooled. This paste will taste nostalgic to those who like the solid sauce, but far from the canned variety you had as a kid. It'll be sharp enough to cut any rich side dishes but also be warm and sweet from the cinnamon and star anise found in the Mulling Spice.
If you're unable to find quince, a firm pear with 2 tablespoons of lemon juice will be a good substitute. As the sauce reduces it should cook down thick enough that when you scrape the bottom of the pan with a spoon the jam won't immediately fill in the space again.