Slow Cooker Jambalaya

Name: Slow-Cooker Jambalaya
Ingredients: extra-virgin olive oil; 1 lb. boneless skinless chicken breast, cut into 1 cubes; 6 oz. andouille sausage, cut into 1/4 slices; 2 garlic cloves, minced; 1 onion, chopped; 1 green bell pepper, seeded and chopped; 1 jalapeno chili, seeded and chopped; 2 celery stalks, chopped; 1 tbsp. chopped fresh thyme; Freshly ground black pepper; 2 tsp. Cajun seasoning; 3 c. low sodium chicken broth; 28 oz. can diced tomatoes; 12 large shrimp, peeled and deveined; 2 c. cooked long-grain rice; Chopped scallions, for garnish