Add butter, frozen onion and frozen cauli (without defrosting first) to the hot frying pan. Cook for a few minutes on high heat until everything is warm and the onion is soft.
Add the eggs and cook, stirring and scrambling as you go until it looks creamy and like risotto. And the eggs are almost set and no longer snotty looking.
Remove from the heat and stir in a few handfuls grated parmesan. Add more butter if you want it creamier. Serve warm or at room temp.