Pour the contents of the Knorr Peri-Peri sauce packet into a jug.
Fill up to the 250 ml mark with rapidly boiling water. Stir with a whisk for 1 minute (alternatively use a fork). Allow to cool.
Heat the oil in a large griddle pan over medium-high heat. Grill the steak for 4 minutes on each side for medium or to your liking. Remove from the heat and allow to rest for 5 minutes.
Combine the cucumbers, onion, tomatoes and fresh coriander in a small bowl. Season with salt and drizzle the lime juice over.
Slice the steak into strips and divide among lettuce leaves. Top with cucumbers, red onion and tomato. Sprinkle with coriander. Drizzle with WARM Peri-Peri sauce. Serve with lime wedges and extra coriander.