Place the diced chicken in a bowl and coat thoroughly with the entire sachet of Nando’s Peri-Peri seasoning. Heat a large non stick frying pan over a high heat and add a little oil or low-calorie cooking spray. Add the chicken and sear for 3-4 minutes, turning regularly, until browned and slightly charred around the edges. Don’t cook it through at this stage; you’re looking for colour and that toasted peri-peri seasoning flavour. Transfer the chicken to the slow cooker.