Process the quince on medium speed until it becomes a smooth jelly. Add the flour, salt, 6 ½ tablespoons of sugar and yeast in the bowl of a stand mixer. Add the oils, yolks, and water into the bowl.

This recipe also takes well to substitutions: you can use graham or arrowroot crumbs instead of digestives; crabapple or another tart red- or orange-hued jelly in place of quince; labneh instead ...