Saw this on the Food Network and was really curious to try these. Who would've thought to use olive oil for something sweet? According to reviewers you can interchangably sub lemon/orange juices for the zests if you don't have them; all I got is just dried orange peels. I made a few changes to the original-- you can use any kind of milk to get that muffin lustre but I use soy milk. Originally called for 4 large eggs, I use only the whites. I also might try these with wheat flour or a mix of white and wheat flours.