Potato and tomato mille-feuilles

Space recipe 'Potato and tomato mille-feuilles': the thin slices of potato, tomatoes and onion are cooked one by one, for a homogeneous colour and a melting and crispy sensation in the mouth. The basic ingredients are potatoes and tomatoes, both thought to be easy to to grow in space, on Mars or other planets. The recipe was developed for ESA, in a research project defining food and nutrition for astronauts on future long-duration space missions.