To cook sunny side up eggs without sticking, start with a non-stick skillet or a well-seasoned cast iron pan, and make sure it's preheated over medium-low heat. Add enough cooking oil, butter, or fat to coat the surface, allowing it to heat until it shimmers or the butter is slightly foamy. This ensures the egg won’t grab onto the pan. Once you crack the egg in, resist the urge to move it around—let it cook undisturbed. With the right heat and enough fat, your egg should slide out effortlessly!