Roast Chicken with Balsamic Bell Peppers

INGREDIENTS

• 5/8 teaspoon salt, divided
• 3/4 teaspoon fennel seeds, crushed
• 1/2 teaspoon freshly ground black pepper, divided
• 1/4 teaspoon garlic powder
• 1/4 teaspoon dried oregano
• 4 (6-ounce) skinless, boneless chicken breasts
• 2 tablespoons olive oil, divided
• Cooking spray
• 2 cups thinly sliced red bell pepper
• 1 cup thinly sliced yellow bell pepper
• 1/2 cup thinly sliced shallots (about 1 large)
• 1 1/2 teaspoons chopped fresh rosemary
• 1 cup fat-free, less-sodium chicken broth
• 1 tablespoon balsamic vinegar