Owners and wife and husband Ota and Nelson Zambrano pose with regular customer Harry Gottlieb outside the Donut Gallery Diner, celebrating its 40th anniversary on Key Biscayne. Allison Diaz / For The Miami Herald

Ted's Special, made with eggs, cheese, a grilled tomato, bacon and ham served open over an English muffin, is a customer favorite at the Donut Gallery Diner, celebrating its 40th anniversary on Key Biscayne. Allison Diaz / For The Miami Herald

Owner Nelson Zambrano, far right, visits with his regular customers at the Donut Gallery Diner, celebrating its 40th anniversary on Key Biscayne this year. Allison Diaz / For The Miami Herald

Owner Nelson Zambrano, top left, visits with his regular customers at the Donut Gallery Diner, celebrating its 40th anniversary this year. Allison Diaz / For The Miami Herald

Owner Nelson Zambrano, top center, visits with his regular customers at the Donut Gallery Diner, which celebrates its 40th anniversary this year. Allison Diaz / For The Miami Herald

Owner Nelson Zambrano refills customers' coffee cups as he visits with them at the Donut Gallery Diner celebrating its 40th anniversary on Key Biscayne this year. Allison DIaz / For The Miami Herald