In a large saucepan, combine the broth, Beck’s Oktoberfest Beer, potatoes, carrots, celery, onion, mustard and pepper. Bring to a boil. Reduce heat; cover and simmer for 20-25 minutes until vegetables are tender. Stir in Johnsonville® Smoked Bratwurst and tomatoes.
Combine cornstarch and water until smooth; stir into stew. Bring to a boil. Cook and stir for 1 minute or until thickened. Serve hot with a thick slice of bread.