For the egg custard with roasted bacon, mix the eggs with water, a pinch of salt and the chopped spring onions and divide among four empty egg shells. Place in an egg carton and steam in a steamer at 100 degrees Celsius for 8 minutes (or steam over steam for 8-10 minutes).
Chop the shallot into small cubes. Heat a frying pan and brown the shallot cubes in a little olive oil. Add the bacon and fry until crispy as well. Spread the crispy bacon on the finished eggs and serve the egg custard with roasted bacon.