Turn Christmas Day leftovers into a delicious Boxing Day treat: Roast Potato Tortilla! I've adapted this recipe from one which featured in the pre-Christmas 2008 Australian magazine 'New Idea' as an excellent way to give new life to leftover roast potatoes. According to the Zaar Kitchen Dictionary, in Spain, the word 'tortilla' refers to a thin omelette, the traditional version of which contains potatoes and Spanish onions. That I find intriguing as I've been making something similar for years - raw potato cubed and onion, garlic and herbs - simply dubbed by me as a 'Chip Omelette'. Very UNsophisticated but delicious nonetheless. You can, of course, use this recipe at any time of the year to use up leftover roast potatoes or any leftover vegetables: sweet potatoes, zucchinis, mushrooms, peas or corn. With a recipe such as this in your repertoire, you may well want to make extra roast potatoes whenever you're roasting potatoes. Traditionally, in Spain, Roast Potato Tortilla is served warm or cold. This makes it ideal for picnics, potlucks and take-to-work lunches. Untraditionally, if you prefer it warm, it is easily re-heated in the microwave. The other recipes posted from this collection are Recipe #345642, Recipe #345416, Recipe #345446.