Wanted to make spanakopita for an outdoor lunch with friends down from the interior of BC and figured we should do a trial batch to see if we remembered how best to make it.
Interestingly, there was a slight bitterness to the first batch we made, noticeable but not really objectionable. We left some overnight and the flavours had blended and the slight bitterness was gone.
When we went to make the next batch for the next day. I thought I'd try something to see if I could avoid any bitterness at all as leaving it overnight would have your nice crisp phyllo pastry going a tad limp.
The sous (Sue?) chef did the dough and put the cooked spinach and feta on it, and then I came in and placed a thin layer of whole basil leaves on top, before the phyllo top layers were applied.
Result - no bitterness at all and a very interesting elusive spicy note from the basil. We sometimes add some dill, but I don't use my favourite addition to other spinach dishes, a good grind of nutmeg, as it isn't traditional, but we will be using the basil next time.