Easy Slow-Cooker Jambalaya

boneless, skinless chicken thighs

smoked sausage, cut into 2-inch slices

large onion, chopped

large green bell pepper, seeded and chopped

stalks celery, chopped

diced tomatoes with juice

garlic, chopped

chicken broth

Cajun or Creole spice mix

dried thyme

dried oregano

extralarge shrimp, peeled and deveined

long-grain rice

Parsley, optional