Eating curcurbit leaves

A colleague mentioned that he eats pumpkin leaves and declares they are "more delicious than kale" to which I replied that's not hard!

Anyhow a bit of googling confirms that I'm not going to poison myself by eating them. And they are in fact quite nutritious.

So.... in your experience what varieties give most foliage? Appreciate it's not something you've necessarily given consideration to but maybe it's better phrasing the question to which varieties have fruit hidden amongst masses of foliage?

One of our plot holders is from Malawi.  He grows curcurbits for their leaves.  I think he grows varieties from Malawi.
He puts them in stews mainly.