In 5- to 6-quart slow cooker, combine chicken, broth, garlic, half of the green bell pepper, onion, paprika, salt, black pepper and cayenne pepper. Cover and cook on low 5-1/2 hours or on high 2-1/2 hours.
Meanwhile, about 30 minutes before paprikash is done, prepare noodles as label directs; drain.
In small bowl, stir together sour cream and flour, and stir into slow cooker. Increase heat to high, cover and cook 5 minutes. Stir in tomatoes, red bell pepper and remaining half of the green bell pepper; cover and cook 10 minutes longer. Serve chicken p