A family favourite! Peel one or two sweet potatoes, cut in pieces and boil until soft. Drain and mash with a fork. Spread a layer of mash on one half of a tortilla, sprinkle with cashew parmesan and fold. Repeat until you run out of mash. Brush the tortillas lightly with some cooking oil. Fry on medium heat until golden on both sides. Cut in halves. Serve with guacamole and a tomato salad.