Various materials appear from other worlds, the same way people do. There's also animals here we can hunt, and there's an ocean nearby. Speaking of which...

[He reaches into his bag and pulls out a paper wrapped slab of something that smells almost like raw tuna, with a faint undercurrent of...chocolate? When he opens it up, it looks just like a large fillet of raw fish. Nevermind that there's no way it could have been in that bag, and it almost looked like he was pulling it out of a Metaverse inventory. A switchknife follows from one of his jacket pockets, which he uses to cut a slice from the fillet.]

This is already prepared to eat as sashimi.