Thanks for posting your query.Hoarseness
associated with fried or oily foods could be suggestive of an underlying allergy
to certain food constituents or as a result of repeated respiratory infections in children with immunological susceptibility.
It's advisable to consult an allergist and ear nose throat specialist to evaluate your child and confirm the diagnosis .
Meanwhile adequate oral hygiene
like twice daily brushing and gargling to prevent throat infections.
Wishing you good health.