Potato-Crusted Chicken Casserole

Ingredients

• 1 large potato, thinly sliced -
• 1 tablespoon olive oil -
• 1/2 teaspoon salt -
• 1/4 teaspoon pepper -
• Filling: -
• 1-1/2 pounds chicken tenderloins, cut into 1/2-inch cubes -
• 2 teaspoons olive oil -
• 1 medium onion, chopped -
• 1 tablespoon butter -
• 2 tablespoons all-purpose flour -
• 1-1/2 cups fat-free milk -
• 1/4 cup shredded part-skim mozzarella cheese -
• 1/4 cup grated Parmesan cheese -
• 2 tablespoons shredded reduced-fat cheddar cheese -
• 2 cups frozen peas and carrots -
• 1/2 teaspoon dried thyme -
• 1/4 teaspoon dried basil -
• Dash rubbed sage -
• CRUMB TOPPING: -
• 1 cup soft bread crumbs -
• 1 tablespoon butter, melted -
• 1/2 teaspoon garlic powder -