Bishul Akum - Crème Pâtissière

Hello Rabbi, a question regarding the laws of food cooked by non-Jews according to the Shulchan Aruch:

Does crème pâtissière need to be cooked entirely by a Jew, meaning that the Jew must light the fire and also place the pot with all the ingredients on the fire?

Or, since all the ingredients, aside from the eggs, are edible even when raw, may a non-Jew prepare the entire cream, and there is no issue of bishul akum in this?

Thank you very much.

Shalom u’vracha 

A mixture of items that do not become prohibited due to bishul akum together with an item that does become prohibited depends on what is the primary component of the food. If the primary component is the prohibited item, it is forbidden. And if the primary component is the other ingredients, it is permitted. 

Regarding the case you asked about, I do not know what is considered the primary component of crème pâtissière. If the eggs are primary, it is forbidden. And if the rest is more primary, it is permitted.

Shulchan Aruch, Yoreh De’ah, siman 113, se’if 2

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