Watercress pesto with linguine ... You can replace it with pecorino if none is on hand. Pine nuts: A must! They are one of ...

To make a pesto, put the basil, garlic, pine nuts and two-thirds of the watercress into a food processor and blend until slightly chunky, then add the oil gradually until it forms a thick paste.

Whilst that is cooking, run a knife trough the watercress. Remove the cooked tart from the oven and serve on a chopping board. Sprinkle over the pine nuts and serve with the watercress.