A Chef, the Vice-Captain of the Rocks Pirates?
Ren is reborn in the world of One Piece. With his parents unknown, he is found and adopted by an old man.
Fortunately, he was born with Observation Haki, and most importantly, Ren is bound to a god-level cooking system.
The cooking skill levels are divided into: Common, Fine, Excellent, Top-tier, Master, Peerless, and God-level.
He even uses his culinary skills to conquer Rocks.
To upgrade his cooking abilities, Ren joins the Rocks Pirates. When Whitebeard, Golden Lion, Kaido, Big Mom... as these legendary great pirates come aboard one by one, they discover that this pirate crew is truly a food lover's paradise.
Ren, as a chef, becomes the vice-captain of the Rocks Pirates.
...
Sengoku: "This fellow, Ren, if he weren't a chef, his bounty would probably be even higher than Rocks'!"
Garp: "Sooner or later, I'm going to capture that guy Ren and make him a chef at Marine Headquarters!"