Chop the pear up and add with the lemon juice in a small pan and simmer until they are soft.
For the topping, whisk the egg white until you have soft peaks and fold in the cacao and almond meal.
Stick the pear and its juices into two ramekins then add, level and smooth the topping (use a wet spoon to make it easier for you).
Stick them in the oven for 20 minutes or until the top is nice and hard