Spaghetti with watercress and feta pesto

Method

1. Pulse the garlic and nuts in a food processor until roughly chopped, add the watercress and pulse again until you have a coarse paste. Spoon into a bowl, stir through the parmesan, then drizzle in the oils until you have a juicy paste. Season with lemon juice, a pinch of salt and lots of black pepper. Stir through the feta, then set aside.
2. Heat a pan over a high heat. Add the lemon slices and quickly fry on each side until starting to caramelise. Remove and set aside.
3. Meanwhile cook the spaghetti in a large pan of boiling salted water for 10 minutes until al dente. Drain, return to the pan and mix through the pesto and lemon slices. Spoon two-thirds of the pasta evenly among warmed bowls (reserve 250g for lunch the next day), then sprinkle with cracked black pepper and basil leaves to serve.