Nan's Recipes: Onion Soup

Ingredients

• 3 tablespoons butter
• 2 cloves garlic, minced
• 4 cups peeled and chopped onions
• 5 cups of canned beef broth (if condensed, thin)
• 1/4 dried thyme
• 1 teaspoon sugar
• 1/2 teaspoon Dijon mustard
• thickly sliced French bread, toasted
• 2 ounces Gruyere, shredded, per serving
• Salt, pepper, and Parmesan cheese to taste