Sesame Chicken With Cabbage And Red Grapefruit Sauce

Ingredients

• 4 boneless, skinless chicken breast halves (5 ounces each)
• 2 red grapefruit
• 1/2 pound napa cabbage (about 1/2 small head), cut into 4 wedges, core intact
• 6 scallions, cut on the diagonal into 2-inch pieces
• vegetable-oil cooking spray
• 1/3 cup sesame seeds
• 1 teaspoon coarse salt
• freshly ground pepper
• 1/4 teaspoon toasted sesame oil
• 2 teaspoons olive oil
• 2 tablespoons finely chopped shallot
• 1 1/2 cups freshly squeezed red grapefruit juice (from about 3 red grapefruits)
• 1/4 cup dry white wine
• 1 teaspoon minced peeled fresh ginger