1. 1. Preheat the oven to 375°F (190°C).

2. 2. In a large bowl, mix together the light sour cream, mayonnaise, and dijon mustard.

3. 3. Add the chicken broth and stir until well combined.

4. 4. Stir in the great northern beans.

5. 5. Place the cooked chicken in a baking dish and pour the creamy sauce mixture over it.

6. 6. Bake in the preheated oven for 25-30 minutes, or until bubbly and heated through.

7. 7. Serve hot and enjoy!