Wash the potatoes well and trim away any discolored spots or eyes. (You may peel the potatoes if you like.) Slice thin and drop into a pot of cold, heavily salted water. Set over high heat and bring to a boil. Boil the potatoes for 1 minute, drain, and rinse with cold water. Drain again and pat dry.
Combine the ricotta and parsley and season generously with sal