Easy Tuna Pasta Bake

Ingredients : 1 (14.6 ounce) package penne pasta 1 tablespoon olive oil 1 tablespoon butter 1 onion chopped 3 (5 ounce) cans tuna drained and flaked 1 cup heavy whipping cream salt and ground black pepper to taste ½ teaspoon ground nutmeg 1 ¼ cups grated Parmesan cheese Methods : Bring...