This recipe is for Ultimate Crispy Roasted Potatoes that have a crunchy coating and a creamy interior. It involves parboiling the potatoes before roasting, using Yukon Gold potatoes for flavor, and adding a mashed Russet potato for crispiness. Repeat testing led to the development of this recipe, which includes optional rosemary oil. The step-by-step instructions and ingredient notes help ensure the best results, and there are tips for making the recipe successfully. The recipe can be served as a side dish for various meals.