Heat the oven to 190°C (Gas Mark 5 / 375°F).
Add the salsa to the bottom of an individual ramekin, and top with the refried beans. Make a slight well in the centre, and crack the egg on top. Top with the grated cheese and a little salt and pepper.
Put the ramekin on a baking tray, and bake in the oven for around 15 minutes, or until the whites of the eggs are cooked.
Finish with some fresh coriander, and serve immediately.