In another pan add 30 gram butter add urad daal, cumin seeds and curry leaves. Let is sizzle for 20 to 30 seconds. Add the onions and potatoes and sauté for a minute. Add in the peas and the puréed mint paste. Mix well and let it cook for 2 minutes stirring occasionally. Add in the vermicelli, salt and 500 ml hot water and mix well.