Leek, mascarpone and lemon Gnocchi with walnut & parsley pesto

Directions

• Trim the leeks, halve them lengthways then finely shred each half. Wash well to remove any grit. Heat 2 tablespoons of oil in a frying pan. Add the leeks. Fry on a low heat for 10 minutes, stirring now and then to stop it catching. Add a splash of water if they look like they might catch at any point.
• Meanwhile, put a large pan of water on to boil. Wash the watercress and half the bag of parsley. Leave the watercress to drain in a colander, pat or shake the parsley dry and finely chop it. Put it in a bowl.
• Finely chop the walnut pieces. Add them to the parsley. Peel and crush or very finely chop 1 garlic clove. Add that too. Finely zest quarter of the lemon rind. Add to the walnut and parsley mix, with the juice of quarter of the lemon, the Parmesan and a good glug of olive oil to loosen the mix. Season with a little salt and pepper and keep to one side.
  
• After 10 minutes of cooking the leeks, add the white wine and simmer for 2 minutes. Once the wine goes into the leek pan, add the pack of gnocchi to the pan of boiling water. Cook for 2-3 minutes, or so, until the gnocchi rise to the surface. Drain them into a colander.
• Add the mascarpone to the leeks, with the drained gnocchi and watercress. Simmer to thicken the sauce and wilt the watercress. Check the seasoning and serve drizzled with the chunky walnut and parsley pesto.