Lover’s French Onion Soup

Name: Lover’s French Onion Soup
Prep time: 20 min
Cook time: 1 h 15 min
Total time: 1 h 35 min
Cuisine: American
Ingredients: 4 to 5 large sweet onions, ((about 2lbs worth), sliced); 6 tablespoons unsalted butter; 1 teaspoon chopped fresh thyme; ½ teaspoon salt; ½ teaspoon freshly cracked black pepper; 3 tablespoons bourbon; 2 garlic cloves, (minced); ⅓ cup dry sherry; 6 cups beef stock; 1 to 2 sprigs of fresh thyme, (plus extra for garnish); 8 ounces gruyere cheese, (freshly grated); bread slices, (cut into heart shapes)