Fry the mince in wok or large frying pan for about 5 mins
Make well in centre of pan, moving mince to sides and add oil and fry onions for 2 mins. Then add garlic and cook for further 2 minutes. Then mix well with mince and cook till lightly browned.
Add chancham spiced tamarind marinade and cook for a further 3-4 mins.
Roughly chop the avocado and place in bowl. Peel tomato (score with sharp knife and cover with just boiled water for 1 min) and deseed and chop into 1 cm cubes. Place all ingredients in bowl and mix.
Mix all salsa ingredients in a bowl.
Fill tacos with mince, salsa and guacamole and finish with finely sliced Chinese leaf or lettuce of choice!
For chancham Guacamole