How long do you fry German strudel dumplings with potatoes on the bottom of the pan?

Do you fry the potatoes and onions for a while in oil and then add a little water and the strudels and cover them? Or do you put the strudels in at the same time as the potatoes and cover them? (I bought some strudels and I don’t know how to cook them. There’s no instructions on the package)
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