Can I make this sandwich ahead of time?
This sandwich is best assembled and eaten immediately while the egg is warm and the bun is toasted. The egg will continue cooking as it cools, and the bun will soften.
What happens if the feta burns before the egg cooks?
Lower your heat slightly and cook over medium rather than medium-high. The feta should soften and brown lightly, not blacken. If using a non-stick pan, watch carefully as it heats faster.
Can I use a different cheese instead of feta?
Yes. Crumbled goat cheese, ricotta, or even fresh mozzarella work well. Use the same amount and expect slightly different melting behavior—goat cheese will spread more, mozzarella may clump.
Should I cook the egg sunny-side up or over easy?
Sunny-side up is traditional for this sandwich so the yolk stays runny and acts as a sauce. Over-easy also works if you prefer a partially set yolk.
How do I prevent the bun from getting soggy?
Toast the bun lightly and spread mayo on both sides to create a moisture barrier before adding toppings and the warm egg.