Tagliarini con Trevise

• 175 g (6 oz) pancetta stesa, cut into matchsticks
• 2 tablespoons olive oil

In a large saucepan gently fry the pancetta in half the oil and all the butter until the pancetta releases its fat and begins to colour, about 5 minutes. Add the onion and thyme and continue to fry for a further 5 minutes until the onion is light brown. Add the garlic, chilli and the remaining oil and stir for a minute or two to combine before adding the trevise and chicory. Stir for a few minu