I believe we do have all of those ingredients in the kitchen.

[ Although she can't say exactly what kind of fish... not that that seems to matter given how generally non-specific this seems to be anyway. They can check the fridge and find out. The kitchen isn't exactly a place she spends a lot of time in. ]

Although doing this without a specific, solid recipe seems rather dubious. Are any of these website entries from legitimate chefs? [ No, Mitsuru. Because a legitimate chef probably wouldn't make this. ]

Otherwise we may have to just pick the one with the clearest instructions of the selection.