2 tablespoons olive oil

1 pound andouille sausage, sliced into 1/4-inch rounds

1 pound boneless skinless chicken breasts, cut into 1-inch cubes

1 medium onion, diced

1 green bell pepper, diced

1 red bell pepper, diced

2 celery stalks, diced

4 cloves garlic, minced

1 (14-ounce) can fire-roasted diced tomatoes

1 1/2 cups long-grain white rice

3 cups chicken stock

2 teaspoons Cajun seasoning

1/2 teaspoon dried thyme

1/2 teaspoon dried oregano

1/4 teaspoon cayenne pepper (optional)

Salt and black pepper, to taste

1 pound raw shrimp, peeled and deveined

2 green onions, thinly sliced

Fresh parsley, chopped (for garnish)