Lady fingers (Okra) and potatoes

I love ladies fingers and this is one of the ways I like to prepare them. My friend's mum would make this dish and I always relished it whenever she made it. She is a great cook I must say and this is one dish that always reminds me of her cooking. I used to live in this friends house during a certain period of my life and I enjoyed everything that her mum cooked.I am not sure if this is the exact recipe she follows but it does tastes as good as hers:)

1/2 kg lady fingers, cleaned ,dried and cut to pieces
2 medium potatoes ,cubed
2 small onions, finely chopped,
2 green chillies , finely chopped
2-3 kokum,
1/4tsp turmeric pwd,
1/2tsp chilly pwd,
1/2tsp coriander pwd,
1/4tsp cumin pwd,
1/2tsp ginger garlic paste
1tsp mustard seeds,
oil
salt to taste.

Method:-
Heat oil in a pan, fry the potaoes slightly remove and keep aside .Fry the ladies fingers and keep aside.Add some more oil to the pan , splutter the mustard seeds. Add the onions and chillies,fry till soft, add the ginger garlic paste and fry for some more time till the raw smells goes than add the spice powders.Mix well and add the ladies fingers , potatoes and kokum , salt . Cover the pan with some water on the lid . Cook till done ( keep stiring ocationally to avoid the veg from burning at the bottom)