Begin by rinsing your fresh cranberries in cold water, discarding any soft or mushy ones.

Using a microplane, zest the navel orange to capture its fragrant oils, then halve the orange and squeeze out the juice.

In a food processor, combine the rinsed cranberries, orange zest, orange juice, lime juice, and granulated sugar.

If you're including walnuts, toss them in the food processor and pulse briefly to combine.

Transfer the relish to a serving bowl and chill in the refrigerator for at least one hour.