Bring a small saucepan of water to a gentle simmer.

Crack the egg into a small cup, then gently slide it into the simmering water.

Poach for 3-4 minutes until the white is fully set and the yolk is soft.

Meanwhile, mash the avocado with lemon juice, salt and pepper until smooth and soft.

Spread the mashed avocado onto a small plate.

Remove the egg with a slotted spoon, drain briefly, and place on top of the avocado.