When does the feta cheese go in?

I've never made this specific recipe, but I've made zucchini pancakes/fritters with feta before - I think I'd fold the feta crumbles in last (i.e., after step 3 here,) just before frying. But this looks like a wonderful recipe and probably hard to mess up, regardless. Also looks delicious!

I'd add it in step 2, when you're adding in the herbs, pepper flakes, and zest.