French onion soup

Ingredients

• 1 pound yellow onions
• 3 tablespoons olive oil
• 4 garlic cloves
• 1 teaspoon white sugar
• 2 teaspoons thyme
• 2 tablespoons white flour
• 1/2 cup dry white wine
• 8 cups vegetable broth
• French bread slices
• 10 ounces Gruyere or Swiss cheese