Bobby Flay's Cranberry & Grapefruit Sauce
Photo: Victor Protasio 2 Tbsp. canola oil1 small red onion, finely diced2 Tbsp. finely grated fresh ginger (from 1 [6-in.] piece ginger)2 tsp. finely grated orange zest, plus 1 cup fresh juice (from 2 oranges), divided1 cup fresh grapefruit juice (from 2 grapefruits)1 cup cane sugar, plus more to taste1 lb. fresh or frozen cranberries, divided2 Tbsp. Campari2 (14-oz.) grapefruits, segmented¼ tsp. kosher salt¼ tsp. black pepper1 Tbsp. chopped fresh flat-leaf parsley...