In a medium saucepan, heat oil over medium heat. Add onion and cook until translucent, about 3 minutes.
In a small bowl, whisk together pineapple juice, lemon juice, and cornstarch.
To saucepan, add cranberry sauce, lemon zest, pineapples, cloves, ginger, salt, and pepper; stir to combine. Bring mixture to a boil, and stir in cornstarch mixture. Continue to boil, stirring frequently, until mixture reaches 200º on an instant-read thermometer and has thickened, about 3 minutes.
Transfer to a heatproof bowl, and let cool on a wire rack, stirring occasionally. Refrigerate in an airtight container until ready to use.
Notes
*We used pineapple juice reserved from pineapple tidbits and Ocean Spray Whole Berry Cranberry Sauce.
Recipe by Victoria at https://victoriamag.com/smoked-turkey-with-cranberry-relish-tea-sandwiches-recipe/