Creamy Tortellini French Onion Soup

Bahan-bahan (6 porsi)

• 6 tablespoons salted butter
• 4 medium yellow onions, thinly sliced
• 1/2 cup dry white wine, such as Pinot Grigio or Sauvignon Blanc
• 3 cloves garlic, chopped
• 2 cups sliced cremini or wild mushrooms
• 2 tablespoons fresh thyme leaves
• 2 tablespoons chopped fresh sage
• 1 pinch kosher salt
• 1 pinch black pepper
• 6 -8 cups low sodium chicken or vegetable broth
• 1 parmesan cheese rind
• 1/2 cup heavy cream or whole milk
• 1 pound fresh cheese tortellini
• 6 slices french bread
• 2 cups shredded Gruyère cheese
• 1 tablespoon chopped rosemary or thyme