Spray 13x9-inch (3-quart) glass baking dish with cooking spray.
In 10-inch skillet, heat 2 teaspoons of the oil over medium-high heat.
Add bell pepper, onions, celery, 1/2 teaspoon of the Cajun seasoning, the paprika and red pepper; cook 2 to 3 minutes, stirring occasionally, until onions start to soften.
Add sausage; cook 4 to 5 minutes or until sausage is heated through.
Add sausage mixture, rice, tomatoes and broth to baking dish; stir to combine.
In medium bowl, mix chicken, remaining 2 teaspoons oil and remaining 1 1/2 teaspoons Cajun seasoning; stir to coat.
Place chicken on top of rice mixture; cover with foil.
Bake 45 to 50 minutes or until juice of chicken is clear when center of thickest part is cut (at least 165°F).