I altered a few ingredient amounts- reduced onion to 1 cup and doubled the lemon zest. I do think the white sauce tastes a tad too floury so next time would reduce the flour to 3 tablespoons, think it does need the liquid amount suggested. Did not use panko b/c I discovered that I need to buy some. Think chopped toasted walnuts might be nice instead of panko. Thank you Ck2piz for sharing.