Hi Mamta, I was recently introduced to this vegetable and tried it this evening. To my amazement my family enjoyed it tremendously including my 13 year old boys, who tried it this evening for the first time.
I tried to search for a recipe but no luck, so I did my own thing:
Top and tail the palpal and cut into quarters
Heat oil in a pan and add 1 tbsp black mustard seeds
As soon as they finish popping add 1 sliced onion and brown lightly
add 3 flakes of grated garlic and 1 sliced green chilli
add the pappal and fry for a good 5 min
next add
2 tsp turmeric
1 tbsp ground coriander powder
1 tsp kala namak (black salt)
3 ripe red chopped tomatoes
Give all this a good mix, then cover and simmer gently 10 min
Remove lid and add fresh chopped coriander leaves
MAGIC!!
This recipe sounds lovely to me Liza. In my part of India, Parwal and Tindora are two different vegetables, though very similar looking. I know people often mix them up.
Parwal has a slightly tougher skin and pointed ends (http://www.spicesofindia.co.uk/acatalog/Fresh-Parwal-Parval-Patola.html), while tindora (http://www.nandyala.org/mahanandi/archives/category/indian-vegetables/dondakayatindora/) has tender skin and slightly rounded ends. The recipes given here are not too different from yours, take a look;
Best wishes
Mamta