Three Cheese Mushroom and Tortellini Soup

Bahan-bahan (8 porsi)

• 2 tsp butter
• 2 stalks of celery (chopped)
• 1 small onion (chopped)
• 1 carrot (peeled & chopped)
• 2 cloves of garlic (minced)
• 8 cups reduced sodium chicken broth (vegetable broth for vegetarians)
• 2 cups water
• 5 oz shitaki mushrooms (sliced)
• 8 oz baby bella mushrooms (sliced)
• 1 small Parmigiano Reggiano rind (optional)
• 9 oz three cheese tortellini (Buitoni)
• salt to taste
• 1/2 tsp fresh ground pepper
• Parmigiano Reggiano (grated (optional for topping))