Combine contents of the Knorr Ginger & Lemongrass Flavour Pot with the oil and soy sauce in a small bowl. Whisk until combined and spoon into a ziplock bag.
Add the salmon fillets to the bag, push the air out and seal, making sure the salmon is well coated.
Leave to marinade for an hour or so.
Brush a cast iron grill pan with a little oil and heat on medium-high.
Place the salmon fillet, skin side up, on the hot grill for 4-5 minutes. Turn and cook on the other side for another 4-5 minutes, depending on the thickness of the fillet.
Serve immediately with a fresh rocket salad, lime wedges and finely sliced red chilli.