A comforting, rustic French garlic soup made with whole cloves of garlic, broth, and herbs, resulting in a rich and flavorful bowl perfect for chilly days.

2 whole heads of garlic, peeled

1 tablespoon olive oil

1 onion, chopped

2 tablespoons butter

6 cups chicken or vegetable broth

2 sprigs fresh thyme

2 bay leaves

Salt and pepper, to taste

4 egg yolks

1/2 cup grated Parmesan cheese

Crusty bread, for serving

Fresh parsley, chopped (optional for garnish).