In 3 1/2 to 4- quart cooker, combine beef, carrots, onion and bell pepper. Add flour, paprika, salt, thyme and pepper; toss to coat. Add chili sauce and broth; mix well.
Cover; cook on low setting for 7 to 8 hours.
Allow 35 minutes before serving, stir mushrooms into stew. Cover; cook on low setting an additional 20 to 30 minutes or until mushrooms are tender. Meanwhile, cook noodles to desired doneness as directed on the package. Drain.
At serving time, stir sour cram into stew until well mixed. Spoon noodles into individual shallow bowls. Top each with stew. Sprinkle with parsley.