An easy make-ahead sauce that combines the sweet and savory flavors of currants, pine nuts, and saffron, this relish that will be right at home next to this years Thanksgiving turkey or Christmas roast.
Preheat oven to 350°. Toast pine nuts on a rimmed baking sheet just until pale golden and fragrant, 8 to 10 minutes. Let cool completely. Meanwhile, in a small bowl, combine currants, saffron, and hot water, adding more water as needed to just cover currants; let stand 10 minutes. Strain, reserving saffron water.
Heat oil in a medium saucepan over medium-low. Add celery, onion, chile, and fennel seeds; season with salt. Cook, stirring occasionally, until mixture is soft and sticky but not taking on any color, about 15 minutes. Remove and discard chile. Transfer onion mixture to a bowl.
Pulse currants in a food processor 3 to 4 times, just until coarsely chopped. Add pine nuts and pulse 2 more times (mixture should be chunky and sticky). Stir currant mixture into onion mixture. Stir in saffron water, a little at a time, until relish has desired consistency; season to taste.
You can make this relish up to five days ahead and refrigerate it in an airtight container. Bring it to room temperature before serving, and loosen with a bit of water, if needed.