That would be ngisi ni watamu.
Also, it's a bit unnatural in English (although by no means incorrect).
Usually when referring to 'meat' we omit the 'a' or 'the'. e.g. 'Squid (meat) is delicious.' the "Meat" being thus understood. 'A' and 'the' refer to an alive animal (who probably wouldn't want to be assessed for its 'delicious-ness'!)