"Sunny-side up" refers to a method of cooking eggs where the egg is fried on one side only, leaving the yolk intact and visible. The result is a bright yellow yolk that resembles the sun, hence the name. This cooking style allows the egg white to become firm while the yolk remains runny, making it a popular choice for breakfast dishes. To prepare sunny-side up eggs, a small amount of oil or butter is heated in a pan. The egg is cracked into the pan and cooked gently until the white is set but the yolk is still soft. This technique is often enjoyed with toast or as part of a larger meal, such as a breakfast platter.