Tamagoyaki used to be the most popular food for kids at lunch, including for me. Tamagoyaki is a Japanese omelet. Egg yolks A couple years ago, when I went back to Japan for a visit, I noticed egg yolks were a very vivid reddish-yellow color, much different from Canadian eggs. I wondered why Canadian egg yolks were such a plain yellow. I found out that diet contributed to the color of the yolks. If the diet contains yellow or orange plants, those colors will be deposited in the yolks. In North America, hens are fed grain and milo. In Japan, they are fed corn and soybean oil cake. That is