French Onion Soup

Name: French Onion Soup
Cuisine: European, Mediterranean, French
Ingredients: 6 large yellow onions, thinly sliced; 3 tbsp unsalted butter; 2 tbsp olive oil; 2 cloves garlic, minced; 1 tbsp all-purpose flour; 1/2 cup dry white wine; 1.2 litres (5 cups) beef stock; 1 bay leaf; 2-3 sprigs fresh thyme; Salt and freshly ground black pepper, to taste; 1 baguette, sliced; 1 cup grated Gruyère cheese