Add the chicken to a bowl, along with all of the peri-peri chicken ingredients except the oil. Mix well to combine.

Place a pan over medium-high heat, add spray oil and chicken, and cook for 2 1/2 minutes on each side until golden and cooked. You can add a splash more of Nando’s peri-peri sauce right at the end. Remove, rest, and slice into strips.

In a saucepan over medium-high heat, add the unsalted butter and allow it to melt. Add the onion and red bell pepper (capsicum) and cook for 3 minutes, mixing regularly. Add the garlic and tomato paste and cook for 2 minutes.