Ingredient:

• 1 (16 ounce) package dry fettuccine noodles
• 1 ½ tablespoons butter or margarine
• 1 cup chopped green onions
• 4 cloves garlic, minced
• 1 pound medium shrimp - peeled and deveined
• 1 pound sea scallops
• 2 cups half-and-half cream
• salt and pepper to taste
• 1 cup freshly grated Parmesan cheese
• 2 tablespoons cornstarch (Optional)