Injipuli is a typical kerala dish, in some area they use to call puli inji, both are same and it is a delicious dish goes along with rice & kaalan (made with banana or yam).

Ingredients:

Tamarind             :  1 big lemon size
Jaggery                : 1" piece
Turmeric pdr        : 1 pinch
Chilli pdr             : 1/2 tsp
Green chillies       : 4 nos chopped
Ginger                 : 1"piece chopped finely
Mustard seeds     : 1/2 tsp
Fenugreek seeds : a pinch
Red chillies         : 2 split into two
Salt  to taste
Oil                      : 2 tbsp
Curry leaves       : 1 sprig

Method

Soak Tamarind in 1 cup of water  for 30 mins  and take the extract, keep aside.
Heat  oil in a Kadai  add mustard seeds, fenugreek seeds  and red chillies. When it splutters add curry leaves. ginger, green chillies etc. Saute for a while and now add tamarind extract , salt , chilli pdr and turmeric pdr. Add 1 more cup of water and add jaggery, let it boil for 5 mins. It should be slightly thick gravy.