It's cooked duck egg yolks, heated and chopped, salted egg yolks are sold in supermarkets, about twenty dollars, fifteen egg yolks, vacuum packs, I'll give you my previous answer, first of all, one third of a bag of salted egg yolks is enough to steam for eight minutes, chopped into mince, peeled, cut the pumpkin into rectangular slices, not too thin, blanch it in boiling water, shake a little bit of custard, no can not be put, twice as much as the raw meal, evenly wrapped in the pumpkin, that's what you said, the shell into the Fry it in salad oil, not too hot, leave the oil in the pan, put in the egg yolks, two tablespoons of sugar, half a tablespoon of salt, stir to make the egg yolks melt, add the pumpkin and turn it over twice. It's hard to do, I've simplified it for you, that's the way we do it in the restaurant, if you don't know how to do it, leave it with me.