1: Brown beef: Add oil to large skillet over medium-high heat, then add beef (work in 2 batches if necessary; do not overcrow the pan). Season beef with salt and pepper and sprinlkle with flour; then cook until browned on all sides. Remove to a 5-6 quart slow cooker.
Cook mushrooms: Add onion, garlic and mushrooms to the hot skillet over medium heat. Cook until softened, about 4-5 minutes. Season with gorund paprika, parsley and thyme; then add wine (or extra broth), beef broth and Worcestershire sauce, scraping any browned bits off the bottom of the pan. Bring to a boil, then take off the heat and season with salt and pepper to taste.
Slow Cook: Carefully transfer mushroom and beef broth mix to meat in the slow cooker. Stir well, then cover with a lid and cook on LOW for 8 hours or on HIGH for 4 hours.
Thicken: Once cooking time is up, open the slow cooker and stir. Stir in a cornstarch slurry, then cook with the lid OPEN for 5-10 minutes or untul thickened. Serve immediately.
