Prepare ravioli according to package directions. Heat olive oil in a skillet, Cook mushrooms until tender and stir in garlic. Add brandy and cook for 2 minutes. Stir in heavy cream and bring to a simmer. Season with nutmeg, salt and pepper. When cream has thickened stir in 1/4 cup of cheese. Stir in cooked ravioli and gently simmer for 1-2 minutes. Serve with grated Parmesan and fresh ground black pepper.