It's an isekai novel Protagonist is female and a child io a noble house, she was also a "villain" character I think. Her mom is very weak and don't like veggies so she helped by telling the cooks to mix veggies into her porrige(?) Sorry for being so vague but that's all I can remember. Thank you.
Tensei Reijou wa Shomin no Aji ni Uete Iru maybe?? this one is a foodie novel I dont really remember the beginning all to well
https://www.novelupdates.com/series...en-watashi-wa『futsuu』no-koushaku-reijou-desu/ this one maybe..?