Potato and Mushroom Soup

Ingredients

• 1 onion, chopped
• 1/4 cup butter
• 2 tbsp. flour
• 1/2 tsp. salt
• 1/2 tsp. black pepper
• 2 cups water
• 2 small cans sliced mushrooms, drained
• 2 stalks celery, chopped
• 3 potatoes, peeled and diced
• 2 carrots, chopped
• 2 cups milk
• 1/2 cup Parmesan cheese, grated