oh my, it is perfectly okay to eat the leaves of rape and other brassicas, just check as YT suggests.
And as for broccoli leaves, it is my understanding that broccoli leaves contain more vitamins and minerals than any other part of the broccoli plant. Eat your broccoli leaves!! I chop them up and add later in the cooking process, because they take less time to cook than the broccoli head and stems.
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