Broth Directions: Place celery, apple, apple juice, shallots, mustard seeds and star anise in a large heavy saucepan. Cover and bring to a boil over high heat. Reduce heat to medium-low and simmer, uncovered, for about 45 minutes or until liquid has reduced and is syrupy. Strain and set aside. Discard solids.
Scallops Directions: Preheat oven to 250°F. Season scallops with salt and pepper. Place 2 teaspoons of Vadouvan curry blend on a small plate. Dip both flat sides of scallops in curry; place on large plate. Heat 1 tablespoon of oil in heavy large skillet (preferably cast iron) over medium-high heat. Add scallops and cook until seared on first side, about 2 minutes. (Do not crowd the scallops in the pan or you won’t get a nice sear. You may need to do more than one batch, depending on the size of your pan.) Flip scallops and cook another 2 minutes or so, until seared on second side and barely opaque in the center. Transfer to a small baking sheet and place in oven to keep warm. Heat remaining 1 tablespoon of oil in the same skillet. Add apple and celery. Sauté until apple begins to soften, about 3 minutes. Add apple broth and remaining ½ teaspoon Vadouvan curry blend. Increase heat to high and boil until mixture thickens, about 10 minutes. Stir in vinegar. Season with salt, pepper and more vinegar, if desired. Divide broth mixture among 4 shallow pasta bowls. Add scallops and garnish with chives.