Ingredients:
• 1 1/2 lbs ground beef
• 1 cup breadcrumbs
• 1/2 cup milk
• 2 large onions, thinly sliced
• 2 garlic cloves, minced
• 1 egg, beaten
• 2 Tbsp Worcestershire sauce
• 1 Tbsp Dijon mustard
• 1 tsp dried thyme
• 1/2 tsp salt
• 1/2 tsp black pepper
• 2 Tbsp butter
• 1/4 cup beef broth
• 1 cup shredded Gruyère or Swiss cheese
Prep Time: 25 minutes | Cooking Time: 1 hour 10 minutes | Total Time: 1 hour 35 minutes | Kcal: 450 | Servings: 6