From Edwina
I had delicious Thoran when I was in Kerala (in the south west of India). I haven't tested this recipe but it looks similar to one that I have made. As with all cooking (and especially Indian cooking), you can alter the spices to suit your taste (or, as my Indian 'mother' told me, the taste of your husband and sons!!).
Heat oil, briefly fry mustard seeds, cumin seeds and then curry leaves, and then onion, until slightly browned.
Add salt, chilli and turmeric, and stir well. Add coconut, cook and stir for a few minutes, then add vegetables.
Cover and cook over a low flame, stirring occasionally, until cooked.