Add red bell pepper and continue to cook until it starts to soften.
Add salt and paprika and stir to mix well.
Add chicken to the pot and stir to coat with the onion/pepper mixture.
Add bay leaf and enough water to cover the chicken.
Bring water to a boil and stir to combine everything.
Cover pot and reduce heat too low. Simmer on the stove for 1 1/2 - 2 hours, until chicken is cooked through and tender.
In a small bowl, combine sour cream with flour until there are no lumps. Add about a 1/2 cup of the hot broth to the flour and sour cream and blend together.
Add the flour/sour cream slurry to the pot and stir well. Increase the heat to a good simmer and cook until the sauce thickens.