California ? Herb Peterson, who invented the ubiquitous Egg McMuffin as a way to introduce breakfast to McDonald’s restaurants, has died, a Southern California McDonald’s official said Wednesday. He was 89.

Peterson died Tuesday at his Santa Barbara home, said Monte Fraker, vice president of operations for McDonald’s restaurants in that city.

He began his career with McDonald’s Corp. as vice president of the company’s advertising firm, D’Arcy Advertising, in Chicago. He wrote McDonald’s first national advertising slogan, “Where Quality Starts Fresh Every Day.”

Peterson came up with idea for the signature McDonald’s breakfast item in 1972. He “was very partial to eggs Benedict,” Fraker said, and worked on creating something similar.

The egg sandwich consisted of an egg that had been formed in a Teflon circle with the yolk broken, topped with a slice of cheese and grilled Canadian bacon. It was served open-faced on a toasted and buttered English muffin.