Melt the butter in a large saucepan over medium heat. Add the ginger and shallots and cook until the shallots are softened, 2 minutes, and then pour in the sherry and vinegar and simmer until the liquid is almost completely absorbed, 3 minutes. Stir in the sugar, lemon zest, whole cranberries and 1/2 cup water. Bring to a simmer and cook until the cranberries begin to burst and the mixture is thick and syrupy, 20 minutes. Pour into a medium bowl and let cool slightly. Fold in the chopped cranberries, walnuts, scallions and pears and season with the salt and pepper. Chill until ready to serve.
Recipe courtesy of Treva Chadwell for Cooking Channel