Mushrooms – used here instead of the bun – are a great source of Vitamin D, especially if you let them sunbake in noon sun for 20 minutes before using! Sweet potatoes work wonders in helping to keep you regular and are nutritionally at their best when consumed with a little fat. Leftover fritters, and there will be about 6, can be stored in the fridge, enjoyed with a poached egg or eaten as a snack straight out of the fridge.