Sweet and Sour Potato Curry

Ingredients

• 4 Tbsp oil
  
  1/4 tsp ajwain
  
  3 cloves
  
  3 split green cardamoms
  
  2 ground onions
  
  1/2 tsp ginger paste
  
  1 tsp garlic paste
  
  1/4 turmeric powder
  
  1/2 tsp mild chilli powder
  
  Salt, to taste
  
  1/2 kg small potatoes, boiled, peeled and fried
  
  150 ml whipped yoghurt
  
  2 tsp melon seeds-roasted and ground
  
  75 ml ripe mango pulp
  
  2 Tbsp cream
  
  1/4 tsp saffron strands-soaked in 1 Tbsp water
  
  4 split green chillies
  
  1/2 tsp garam masala
  
  Juice of 1 lemon