Brush the pole egg heart shape thoroughly with sunflower oil. Open the egg and separate it. Fill the white egg into the mold, insert the egg-shaped stamp and close the mold. Put the mold in water (about half the height of the mold) and simmer / boil for about 15 minutes. Take out, open, remove the heart stamp and fill the resulting heart cavity with the whisked yellow egg. Close the jar again and simmer / boil for another 15 minutes. Take out, open and press out the heart-shaped stick egg and cut into decorative heart-shaped slices with a sharp knife. There are 5 other shapes for making decorative egg slices (see pictures / Patterned Egg Boil / Egg cooker with 6 different shapes).