Cube round steak into bite size pieces. Place in a mixing bowl. Sprinkle with flour and spices. Stir to coat meat well.
1 1/2 # beef chuck roast or stew meat, 3 tbsp. flour, 1/2 tsp. garlic powder, 1 1/2 tsp. salt, 1/2 tsp. black pepper, 1/4 tsp. paprika
In a large skillet, heat oil over medium-high heat. Add meat and brown on all sides, about 4-5 minutes. Place meat in the bottom of slow cooker.
2 tbsp. vegetable oil
Pour broth, Worcestershire, mustard, onions and mushrooms into slow cooker and stir everything together. Cover and cook on low heat for 6-7 hours.
1/2 cup yellow onion, 2 cups beef broth, 1 tbsp. Worcestershire sauce, 1 tsp. Dijon mustard, 8 oz. mushrooms
During the last 15 minutes of cooking, stir in the sour cream and cornstarch slurry.
1/2 cup sour cream, 1 tbsp. cornstarch, 2 tbsp. cold water
Serve with egg noodles or mashed potatoes.