Preheat the oven to 180°C.
Cut off the top third off the rolls - these will be the lids.
Scoop out the soft bread centre, leaving about 1cm rim. (Make breadcrumbs or croutons from the soft bread).
Rubs some olive oil or dairy-free spread inside the bread bowls then line them with a layer of the prosciutto. Crack in an egg.
Scatter some cheese on top, if used.
Put the rolls in a baking tray and bake for 10 minutes - if the rolls are brown, wrap the tray with foil and bake for a further 10-15 minutes, depending on how runny/solid you like your egg yolk.
Meanwhile, put the lids on another baking sheet and bake them for 5-10 minutes, until golden.
Serve the bread bowls with herbs scattered over the eggs, topped with the lids.