Lightly grease the inside of the ring with very little butter or oil.
Heat one tsp of butter / oil in a large skillet; then place the greased ring into the pan.
Crack the egg directly into ring.
Cook the eggs till it's done, usually three to five minutes. This is a longer cooking time than what is usually required for eggs that are cooked sunny-side-up, but since the egg rings do not allow the eggs to spread out in the pan, the extra thickness requires more cooking time.
Keep in mind that the longer the egg is cooked, the browner the bottom of the egg will become.
When the egg is cooked, remove the ring from the skillet / frying pan with the help of a needle and remove the fried egg ring from the skillet / frying pan with the help of a flat spatula.