Soba noodles are Japanese buckwheat noodles. They are soft and, when served in this aromatic broth, absolutely delicious. This is a great healthy, low-fat dish for kapha. For pitta I would substitute with rice or egg noodles, leave out the raw spring onions and chillies and add a little extra mint and fresh coriander in with the noodles. This dish works really well with the silken tofu, but if you like more texture you can use firm tofu, grilled in the oven for 3 minutes each side. This dish is not for vata.