You can use any leaves for this kuku. I used a total of 7 cups of greens - 4 cups kale and 3 cups of herbs. Four cups of kale sounds like a lot but it was from only 1/2 bunch of kale. You could eat this kuku with any sauce you have around. Yoghurt is a great option, chili oil or crisp works too. Leftover salad dressing would be lovely, as would a dollop of mayo or a squeeze of sriracha.
Spend time and chop the kale and herbs as finely as you can (or use a food processor). It will give you a better final texture. Think of how you would chop parsley and mint for a tabbouleh, that’s how fine you want it. You can also use a food processor to do this job, in fact, your life will be much easier if you do. I doggedly chop by hand, I enjoy the moment of control, but don’t feel pressured to be a masochist like me.