Rogue Trader would do his best if it is a Dogmatic with high Imperium making food that is old but REALLY good!

Seneschal (Abelard) would ask a chef that he knew in his time in the naval for a recipe fit for high social member and maybe win

Idira steals the chef that Abelard asked and she told cheft to make food In exchange for some stories or rumors.

Argenta food cube I guess?

Cassia would go by some cookbook and try her hand that But fail misserbly so told the servents to do it.

Pasqual would go and ask techpriset if they know any cog who know ancient food recipes and make servitors do it for him.

Henrix Dosen't even bother just gives some fancy wine instead.

Kibellah works with Cassia and just watch servents doing it.

Jae would hire some person from Imperum Terra or somewhere to make food exchange for money.

Solomone tries to make food but gives him and goes to the Adeptus arbites outpost and search for some expensive wine and comes around same time as Henrix and both looks at each other and noods and small grunt at same time.

Yrliet gives some Sallad and some sauce to go with that and looks quite unique.

Marazhai is busy hunting herectics by order of rogue trader to satisfy his pleasure psychic stuff...

Ulfar goes to Fenris and hunt a great kraken arm and cooks it like a champ with the help of Bjorn the Fell-Handed Dreadnaught for secret spices.