Radicchio Cole Slaw with Pears and Walnuts

Ingredients 2 heads Royal Rose™ radicchio, cored, leaves separated 1 red onion, thinly sliced 2 Bartlett pears, peeled, cut into matchsticks 1/4 cup red wine vinegar 1/2 cup toasted black walnuts 2 teaspoons vegetable oil 1/2 teaspoon freshly ground black …