Hearty Steak & Tater Soup

From Betty Crocker New Slow Cooker Meals September 2001

1 pound beef boneless round steak
1 pound small red potatoes, cut into 1/4" slices
2 medium stalks celery, chopped
2 medium carrots, chopped
1 medium onion, chopped
2 cloves garlic, finely chopped
1 Tbsp beef bouillon granules
1/2 tsp salt
1/2 tsp pepper
4 cans (14.5oz each) beef broth
1 jar (6oz) sliced mushrooms, undrained
1/2 C water
1/2 C Gold Medal all-purpose flour

Remove excess fat from beef. Cut beef into 1x1/4" pieces. Mix beef and remaining ingredients except water and flour in 5-quart slow cooker.
Cover and cook on low heat setting 8-9 hours or until beef and vegetables are tender.
Mix water and flour; gradually stir into soup until blended. Cover and cook on high heat setting about 30 minutes or until slightly thickened.