French Onion Soup

Name: French Onion Soup
Prep time: 15 min
Cook time: 1 h 45 min
Total time: 2 h
Cuisine: French
Ingredients: 1½ pounds (about 5 cups) thinly sliced yellow onions (3-4 large onions, cut end to end, then sliced); 3 tablespoons butter (I use salted butter); 1 tablespoon olive oil; 2 cloves garlic, finely chopped; 2 bay leaves; 2 sprigs fresh thyme; 1 teaspoon kosher salt; ¼ teaspoon sugar; ¾ cup red wine; 3 tablespoons flour; 2 quarts low sodium beef broth, store bought or homemade; Kosher salt and fresh ground black pepper; 1 French baguette, cut into rounds; 1 clove garlic, cut in half, to rub on toasted bread slices; 2 cups grated Gruyére cheese