Spread both sides of the bread with butter. Then top with the Parmesan, gently pressing it into the butter.

Place the bread in a skillet over medium-low heat, and toast both sides of the bread. This will take about 3 minutes a side.

Use another skillet to prepare the egg, if you want to add an egg to your avocado toast.

Next, combine the avocado, olive oil, lemon, and salt in a small bowl, and mash together with a fork.

Once the toast is ready, spread the avocado on top. Lastly, add the egg. Eat right away.