Whisk the eggs with mascarpone (or crème fraîche) and salt until smooth.
Heat a small nonstick pan over medium heat and add a knob of butter.
Once the butter melts and foams, pour in the eggs and reduce heat to medium-low.
Stir continuously, forming soft curds. Remove from heat while still slightly wet and glossy — they'll finish cooking off the heat.
Top with chives or black pepper. Serve with pan-fried tomato and salami or bacon, if using.