Heat oven to 350 degrees F
Using a wet paper towel, wipe mushrooms clean and carefully remove stems.
In a glass baking dish, place mushrooms in a shallow amount of water. Drizzle with soy sauce and microwave for 5 minutes to soften mushrooms.
Combine cheese, sausage, garlic powder and salt.
Drain mushrooms and fill with cheese mixture. Top with shredded parmesan cheese.
Place back in glass dish and bake for 12-15 minutes or until cheese mixture is heated through and mushrooms are tender.