French Dip au Jus Recipe

Ingredients

• ¼ cup each diced onion, celery, and carrot
• 2 tsp. olive oil
• 1 tsp. minced fresh garlic
• 1 tsp. tomato paste
• 1 cup low-sodium beef broth
• 1 dried bay leaf
• ½ tsp. Worcestershire sauce
• ½ tsp. beef base (such as Better Than Bouillon)
• Salt
• black pepper
• 2 hoagie rolls, halved
• 1–2 Tbsp. unsalted butter, melted
• Coarse salt
• 8 –12 oz. cooked roast beef, thinly sliced
• 4 slices Swiss cheese