Scalloped Portobello Mushrooms

Bahan-bahan (6 porsi)

• 1/2 cup shredded Mozzarella cheese
• 1/2 cup shredded Gruyère
• 1/2 cup parmesan cheese (fresh grated )
• 2 tablespoons fresh parsley (chopped, plus more for garnish)
• 2 teaspoons Italian seasoning (or dried Italian mixed herbs)
• 1/2 teaspoon onion powder
• 1/2 teaspoon garlic powder
• 8 large portobello mushrooms
• 1 pinch salt (to season)
• 1 pinch cracked pepper (to taste)
• 1/2 cup heavy cream
• 2 cloves garlic (minced)