Preheat the oven to 200°C, gas mark 6. Place the chicken on a chopping board and make an incision along the sides to create a pocket in each breast. Avoid cutting right through the chicken.
Place the soft cheese, peppers and basil in a bowl and mix thoroughly. Divide the cheese mixture between the chicken breasts, spooning a little into each pocket. Wrap each chicken breast in a piece of kitchen foil to create a parcel, then place on a baking tray and cook for 20–25 minutes, or until the chicken is thoroughly cooked and the juices run clear.
Place the salad leaves, chopped apple and goji seed and berry mix in a bowl. Drizzle the walnut oil over and toss gently. Keep chilled until ready to serve.
If you prefer your chicken with a little colour, turn the oven up to 220°C, gas mark 7, then remove the chicken from the oven, unwrap each parcel and, keeping the chicken in its foil, return to the oven for no more than 5 minutes until golden brown.
Season with cracked black pepper and serve alongside the salad.
TOP TIP: Extra virgin olive oil is a good substitute for the walnut oil.
Recipe kindly supplied by Waitrose. More than 5,000 recipes can be found at www.waitrose.com/recipes