Grilled Chicken and Vegetable Quesadillas

INGREDIENTS

• 1 1/2 teaspoons paprika
• 1/2 teaspoon garlic powder
• 1/2 teaspoon dried oregano
• 1/2 teaspoon ground cumin
• 1/4 teaspoon kosher salt
• 1/4 teaspoon freshly ground black pepper
• 2 (6-ounce) skinless, boneless chicken breast halves
• 1 small onion, cut into 1/2-inch-thick slices
• 1 small orange bell pepper, cut into 1/2-inch-thick wedges
• Cooking spray
• 3 ounces Monterey Jack cheese, shredded (about 3/4 cup)
• 4 (6-inch) flour tortillas
• 1/4 cup reduced-fat sour cream