Can I use eggs that aren't hard-boiled?
No, the recipe requires hard-boiled eggs halved so the flat side can crisp in the cheese. Soft-boiled eggs will fall apart during frying.
What cheese works if I don't have parmesan?
Pecorino Romano, aged cheddar, or Gruyère work well — use finely shredded varieties that melt quickly and form a crisp crust.
How do I get the cheese to crisp without burning?
Heat oil or butter in a skillet over medium-high heat, lay cheese in a thin layer first, let it set for 30 seconds, then place egg halves flat-side down on top. Cook 2–3 minutes until golden.
Can I make this ahead?
Hard-boil and peel eggs up to 3 days ahead. Toast bread and mash avocado just before serving. Fry eggs and assemble fresh for best texture.
Is this recipe vegetarian?
Yes, all ingredients are vegetarian. Use vegetarian parmesan if desired.