Chicken with Summer Squash and Lemon-Chive Sauce

Ingredients

• 2 tsp olive oil
• 4 (4-ounce) skinless, boneless chicken breast halves
• 1/4 tsp salt
• 1/4 tsp black pepper
• 2 cups 1/2-inch cubed yellow squash
• 1 1/2 cups 1/2-inch cubed zucchini
• 1 cup fat-free, less-sodium chicken broth
• 1 tbsp chopped fresh chives
• 1/2 tsp grated lemon rind
• 1 tbsp fresh lemon juice
• 2 tsp cornstarch
• 2 tsp honey mustard