Cauliflower leaves and cauliflower stalks. You compared them to bok choi pak choi.

花椰菜的叶子和花椰菜的茎。你把它们用作白菜、小白菜。

I've separated the green bits from the stalky bits and treat it just as you would pak choi bok choi which you'd pay quite a premium for in the supermarket.

我把绿色的部分和茎干的部分分开，就像你在超市里花高价买的白菜、小白菜一样。