The menu was never re-costed
Recipes were costed once, years ago. Since then purchase prices have risen and selling prices have not — or only by "a few euros" across the board. Nobody knows which dish still carries margin today and which one eats it.
Cost every dish from scratch, with current purchase prices and real portions. Then rebuild the menu: put the high-margin sellers up front, remove or re-price the margin killers. That is a week of work, not a strategy project.
