Place the beef in the base of a 6-quart slow cooker.
Step 2
Whisk together the beef stock, red wine, tomato paste, Worcestershire sauce, flour, garlic, seasoned salt, and ground black pepper in a large liquid measuring cup. Pour over top of the beef.
Step 3
Add the thyme sprigs, then the onion, carrot, celery, and mushrooms over top. Cover and cook on high for 4 to 5 hours, stirring halfway through.
Step 4
Remove the thyme sprigs, seasoning with more salt and pepper to taste.
Step 5
Serve over cooked wide egg noodles and sprinkle with parsley.