Clean and wash the vegetables. Cut mushrooms into slices, spring onions into rings and peppers into cubes. Steam peppers in hot oil for about 5 minutes. Add mushrooms and spring onions and cook for 3 minutes. Pour on chilli sauce. Season to taste with salt.
Pluck the thyme leaves from the stalks and add to the vegetables. Peel, wash and grate the potatoes. Mix with egg, flour and some salt. Fry about 8 flat buffers in hot fat on both sides until golden brown. Arrange two buffers with some vegetables on each side