Fill a medium pot with water and bring it to a gentle simmer. Add a splash of lemon juice to help the egg whites coagulate.
Crack the eggs into small bowls, one at a time, preparing them for gentle sliding into the water.
While the water is heating, toast the slice of whole grain bread until it achieves a golden, crisp texture.
In a bowl, scoop out the avocado and mash it with a fork until creamy. Season with a pinch of salt, pepper, and a little lemon juice to brighten the flavors.
Create a gentle whirlpool in the simmering water using a spoon, then carefully slide each egg into the water, one by one. Poach the eggs for about 3-4 minutes for soft yolks.
Using a slotted spoon, lift the poached eggs from the water and let any excess water drain off.
Spread the smashed avocado evenly over the toasted bread. Place the poached eggs on top of the avocado spread.
Sprinkle the crumbled feta cheese over the eggs and add a pinch of red chili flakes for a mild kick. Season with extra salt and pepper if desired.
Serve immediately while the toast is warm and the eggs are perfectly soft, enjoying a delightful balance of creaminess, tang, and spice.