This is Thomasina Miers version and I cannot think of anyone better to turn to for a definitive recipe. If you cannot get hold of chipotles en adobe mix two tablespoons of tomato puree or ketchup with a tablespoon of hot smoked pimenton and add dried chillies to taste. Make this the day before if you can as the flavour will be much improved the next day.
A recipe from ” Zaika” by Romy Gill. Use in Samosa Chaat or serve with rice or rotis. You can also make hummus with any leftovers by adding lemon juice and tahini and blending in a food processor.
An easy recipe from Claire Thomson’s ” New Kitchen Basics” . You can use other vegetables or fruit in the mix depending on what you have- for example cucumber, mango or pomegranate. Chaat is an Indian Spice blend which can be purchased in some supermarkets as well as Indian stores.
A recipe from one of the Riverford cookbooks to serve with couscous, rice or bulghar and garnish with green olives or toasted flaked olives. For non vegans yoghurt also goes well with this.