holding yellow custard bun with the filling oozing out

asian bao basket bite breakfast brunch bun cantonese cart cha chinese cuisine custard delicious dessert dim dish dough duck during egg filled filling finger flow flowing flowy food gastronomical halves has holding hot indicate indicating into known liu made meal molten ooze oozing out pillowy plate restaurant runny salted served session sha sized snacks soft split steam steamed steamer steaming sum sumptuous sweet tasty texture tips traditional using usually well when which white with yellow yolk yum