A very simple pumpkin and prawns recipe from Thakurbari which has a strong mustard oil flavour along with garlic and onion. Dried red chilies give an added kick to the dish.
Please note that in case you do not have a pressure cooker, then you can cook in a frying pan or a wok. In that case, you will have to add the musturd oil, then lightly saute the onions and garlic and then the rest of the ingredients. And basically cover and cook. Originally it was cooked in a wok only. However, nowadays with pausity of time, a pressure cooker works wonders.