Melty French Dips with Texas Toast and Au Jus (25 Minutes)

Ingredients

• 8 slices frozen garlic Texas toast
• 1 lb (450 g) thin-sliced deli roast beef
• 8 slices provolone cheese
• 2 tablespoons prepared horseradish, optional
• 1 tablespoon chopped fresh parsley
• 2 cups (480 ml) low-sodium beef broth
• 1/2 cup (120 ml) water
• 1 tablespoon Worcestershire sauce
• 1 teaspoon onion powder
• 1/2 teaspoon garlic powder
• 1/4 teaspoon black pepper
• 1 tablespoon unsalted butter
• Salt, only if needed