Aegean Avocado Toast Stack

Method

1. Gather and prep everything first: eggs, unsalted butter, all-purpose flour and set within reach of the stove.
2. Warm a splash of olive oil in a heavy pan over medium heat, then add the yellow onion and cook until soft and fragrant, about 4 to 5 minutes.
3. Turn the heat up, add the avocado toast, and cook until deeply browned and aromatic.
4. Fold in the baby spinach and season generously; give everything a minute to come together.
5. Taste and adjust, then finish with a grating of hard cheese right before serving.
6. Serve warm, ideally with something to soak up the sauce.