Zesty Savory Onion Cheese Soup Recipe: Cozy Comfort in a Bowl - Beard and Bonnet

Ingredients

• 5 large yellow onions, thinly sliced
• 32 oz (907 g) low-sodium beef broth
• 24 oz (680 g) low-sodium chicken broth
• 1 ½ cups Gruyere Swiss cheese, shredded, room temperature
• ¼ cup Mozzarella cheese, shredded, room temperature
• 2 tbsps Parmesan cheese, finely grated, room temperature
• 4 tbsps butter
• 2 tbsps virgin olive oil
• 5 thick slices French bread
• 1 tbsp Worcestershire sauce
• ½ tbsp balsamic vinegar
• 1 tsp minced garlic
• 1 tsp salt
• 1 tsp granulated sugar
• 2 sprigs fresh thyme
• 1 bay leaf
• Salt and black pepper to taste