Depends on the duties and the restaurant's job requirements.
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If it's a Chef Emeritus, Foreign Speciality, Punjabi Cuisine and the "employer" a large Indian restaurant, could be H-1B or even O=1. I obtained both for French and Italian (Managerial) Chefs in the past. It is hard, but can be done. It will also depend how prominent and known the Hindi Cook or Chef is and what he's got as proofs (awards, prizes, etc.) (s there such thing as the "Golden Curry" award, or close?
Begin by enlisting the services of an experienced Hindi speaking immigration lawyer (that one will understand and appreciate your skills much more (and be able to explain much better) than the non-Hindi lawyer.
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