Wash the rocket. Puree the slightly dried rocket along with the walnuts, garlic and olive oil. Add enough oil to create a creamy consistency. Then grate the parmesan finely and add it. Finally squeeze the lemon and add the juice. Season to taste with pepper, salt and honey. Let it steep for a few minutes before consumption.
In the unlikely event that the pesto doesn`t run out, it can be refrigerated for a few days.