Heat oven to 375°F. Spray 13x9-inch (3-quart) glass baking dish with nonstick cooking spray. In large saucepan, cook bacon over medium-high heat 5 minutes, stirring frequently, until crisp. Remove bacon from saucepan; drain on paper towel.
To drippings in saucepan, add celery, bell pepper and onions; cook over medium heat 5 minutes, stirring occasionally, until vegetables are tender. Add ham, kielbasa, tomatoes, broth, water, thyme and Cajun seasoning; mix well. Heat to boiling. Stir in rice and cooked bacon. Pour mixture into baking dish. Cover with foil.
Bake 30 to 40 minutes or until rice is tender. Stir before serving. If desired, garnish with additional fresh thyme sprigs.