Vegetarian French Onion Soup

• 2 teaspoons unsalted butter
• 1 tablespoon vegetable oil
• 5 large onions, halved and thinly sliced (about 3 lbs)
• 3 garlic cloves, minced
• 1/2 teaspoon salt
• 2 tablespoons all-purpose flour
• 6 cups roasted vegetable broth or 6 cups low sodium vegetable broth
• 1/3 cup dry sherry
• 1 teaspoon Dijon mustard
• 1 teaspoon sherry wine vinegar
• 6 slices sourdough bread, toasted (1/2 inch thick)
• 2/3 cup gruyere or 2/3 cup jarlsberg cheese, shredded

1. Heat butter and oil in heavy, large saucepan over medium heat. Add onions, garlic and salt, and cook 5 minutes, stirring often. Reduce heat to very low, and cook, stirring occasionally, 50 to 60 minutes, until onions are very tender and brown.
2. Stir in flour, and cook 3 to 4 minutes, stirring constantly. Blend in broth, sherry and mustard. Cover, and simmer 15 minutes, stirring occasionally. Stir in sherry vinegar.
3. Preheat broiler, ladle soup into six heat-proof bowls. Top each with slice of toast and grated cheese. Broil until cheese is bubbly and golden, about 1 to 2 minutes. Serve hot.

unsalted butter, vegetable oil, onions, garlic, salt, flour, vegetable broth, sherry, mustard, sherry wine vinegar, bread, gruyere

Taken from www.food.com/recipe/vegetarian-french-onion-soup-174621 (may not work)