Add flour, seasoning salt, pepper, table salt and paprika to large sealable plastic bag. Add stew beef; shake to coat.
Place stew beef in crockpot. Sprinkle with chopped onion and bay leaves.
In large bowl, mix beef broth with red wine, Worcestershire sauce, tomato paste and garlic. Pour over onions and meat.
Place potatoes, carrots and celery on top. Cover and cook on low for 8-10 hours or on high for 4-6 hours or until meat and veggies are tender, stirring occasionally. Remove bay leaves before serving.
Video
Notes
I think beef stew is always more tender when cooked longer, so I recommend cooking it all day on low to ensure it's fork-tender.