Yiddish: He's not interested in the Haggadah but in the dumplings.

SOURCE: Bernstein, Jüdische Sprichwörter und Redensarten. The Haggadah (Hebrew for "telling") is the text read at the Passover Seder, recounting the story of the liberation of the Jews from slavery in Egypt.
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ער מיינט ניט די הגדה, נאָר די קניידלעך.

Er meynt nit di hagode, nor di kneydlekh.

He's not interested in the Haggadah, only the dumplings.