Eyeball a third of the mixture, and place it into a small bowl. Add enough food coloring until it's as yellow as you want it. Then cover both bowls with plastic wrap and freeze for at least 15 minutes -- you want everything to be really cold while you work with it.

Working quickly, take about ½ teaspoon of the yellow mixture and roll it into a ball. Repeat with the rest of the mixture.

Once the yolks are complete, place them on a plate or a sheet tray covered with parchment and then put that back into the freezer.