Boil the green peas until half done, then coarsely mash them.
Boil the potatoes.
Heat oil and ghee, add bay leaves, cardamom, asafetida, ginger and green chilli, stir fry for a minute, then add mashed peas and rest of the masala.
Cook and stir, until half done, add yogurt, stir vigorously and add potato cubes.
Keep stirring and cooking for another 2 minutes.
Add 1 cup water, bring to boil, then lower heat to medium and cover.
Cook for 5 more minutes and take off the pot from heat.
Let stand for 5 minutes and serve garnished with chopped coriander.