

Make the pesto sauce. Place all the pesto ingredients, except the extra-virgin olive oil, in a food processor or blender and whizz to a fine paste. Scrape any pesto from the sides of the bowl. With the motor running, slowly add the oil, until you have a thick green sauce. Add more oil for a thinner sauce.
Heat the sunflower oil in a non-stick pan over a medium-high heat, and fry the steaks for 3-4 minutes on each side, until cooked. Remove from the pan and keep warm.
Add the creme fraiche, milk, 2 tablespoons of the pesto sauce and tomatoes to the pan, and simmer for 2 minutes.
Serve the steaks with the pesto sauce, steamed new potatoes and dressed salad leaves. Store remaining pesto sauce in an airtight container in the fridge for 3-4 days.