Our Whole Family Transmigrated as Cannon Fodder, but We Became Great Cultivators

A family of three is transported into a xianxia novel, becoming cannon fodder who die before they even get names. Luckily, Dad gets an alchemy System and becomes a Pill Sage; Mom gets a musical cultivation System and becomes a Zither Sage; and even the kid brother is a big shot in the book! Only Lu Xianyun gets a God of Cooking System! Immortals all abstain from food, so who's going to eat? But to her surprise, more and more people start coming to her little shop. What?! Drinking her soup lets people comprehend the Dao? Eating her dishes increases their cultivation? Why doesn't it work when she eats them herself? You lousy System, get out here. We need to talk!