Peruvian Potatoes

The best potatoes I have ever tasted came from the mountains of Peru; they had a close waxy texture and were quite a deep yellow colour. It may be only the soil or the climate of the ‘Sierra’ which gives them this characteristic colour, because a reader wrote to me saying that when she bought some yellow seed potatoes back from Peru to plant in England they grew well, but turned white. I remember that we used to eat these potatoes cooked ‘a la Huancaina’, with hard-boiled eggs and onions in