Preheat the oven to gas 7, 220C, fan 200c. Mix the teriyaki sauce, honey, garlic, and ginger in a small bown and then brush over the salmon fillets. Put the fish in a foil-lined roasting tin and leave to marinate for 10 minutes.
Add the noodles and leeks into a pan of boiling water and simmer for 3-4 minutes, drain and then tip into a large bowl. Add the sesame oil, soy sauce, sliced chilli and toss to combine.
Cut out 4 30cmx30cm (12in) squares of nonstick baking paper. Divide the pak choi between each, top each with the noodle mix and a lime half and then scrunch up the paper and tie with kitchen string to make a parcel.
Sprinkle the marinated salmon with sesame seeds and place on the top shelf of the oven. Place the noodle parcels on the next shelf and bake for 8-10 minutes.
Serve the noodles in their parcels (to be opened at the table), or spoon the contents onto a plate, and top with a piece of salmon. Spoon over some teriyaki sauce from the tin to finish.