This eggscellent yin and yang, titled "Eggregation" is made by DPChallenge user scalvert:
It took me a few tries to make this happen: I cut the white shape (and the hole) out of thick paperboard to make a mold. The board wasn't thick enough, so I pressed white paper tape along the edges. Then I covered the shapes with nonstick cooking spray and held them down on a flat griddle. I poured several egg whites into the mold and turned the griddle on to cook it. Carefully removed the mold using an X-acto knife to help separate the edges and then transferred the white shape to the pan with a spatula. Cooked yolks aren't particularly attractive, so I cooked the bottom just enough to be able to transfer it (I went through several because they kept breaking). Once arranged in the pan, I hit everything with cooking spray to make it shiny, then used a butane lighter to lightly scorch the top of the egg white in spots so it would really look cooked.