Beet Greens and Buckwheat Noodles

• leaves and tender stalks from 1 kg bunch beetroot
• 80 g soba noodles

Put a pan of water on for the noodles, adding salt when it boils. Chop and then put the pink stalks and green leaves in a sink filled with cold water, then remove, drain and cook, in just the water clinging to the leafs and stalks, no more, in a thick-based or non-stick frying pan with the lid on to get the steam rising. Meanwhile cook the noodles, drain them and toss in the soy sauce, mirin an