How to make Traditional German Beef Rouladen｜Rinderrouladen｜ Rouladen｜best German Rouladen Recipe

German Beef Rouladen Recipe
Ingredients:
6 beef slices (approximately 1/4 inch thick, 5 inches wide, and 10 inches long)
6 slices of bacon
6 small dill pickles
6 pitted green olives (adjust quantity as desired)
2 onions, thinly sliced
4 teaspoons Dijon mustard
Salt and pepper to taste
2 tablespoons vegetable oil
2 cups beef broth (or chicken broth)
2 cups dry red wine
2 tbsp tomato paste (for added flavor)
1 onion, diced
2 carrots, diced
2 stalks celery, chopped
2 sprigs fresh thyme
2 bay leaves
Salt and pepper to taste
2 tablespoons butter