Easy Crockpot Cassoulet

1 tablespoon olive oil
1 large onion, finely chopped
4 boneless skinless chicken thighs, or breasts chopped
1/2 pound cooked smoked sausage, diced
3 cloves garlic, minced
1 teaspoon dried thyme leaves
1/2 teaspoon black pepper
4 tablespoons tomato paste
2 tablespoons water
3 cans (about 15 ounces each) great northern beans, rinsed and drained
3 tablespoons minced fresh parsley

Heat olive oil in large skillet over medium heat. 
Add onion to hot oil; cook and stir until onion is tender, 
about 4 minutes. Stir in chicken, sausage, garlic, thyme, 
and pepper. Cook 5 to 8 minutes, or until chicken and 
sausage are browned. 
Stir in tomato paste and water; transfer to slow cooker. 
Stir great northern beans into the chicken mixture; 
cover and cook on LOW 4 to 5 hours. 
Before serving, sprinkle parsley over cassoulet. 
Serves 6.