In a large bowl, add chopped onions, tomato ketchup, mint sauce, mango chutney, cumin powder, garam masala, chilli powder, beetroot powder sea salt & water. Mix well, let stand for 5 minutes and mix well again.
Cover the onions and set aside in the fridge for 1-2 hours. Mix once more before serving with freshly fried poppadoms.
If you find raw onions a little too harsh, you can soak the chopped onions in cold water for 10-15 mins and rinse / drain before combining with the other ingredients. This method can be used for onions intended for use raw in any type of salad and helps to mellow the sharp flavour.