Put 2 squares of baking paper on top of 2 pieces of foil, and put the salmon in the middle of each. Mix the ginger, soy sauce, chilli, chopped stem ginger, syrup and garlic, then pour over the salmon fillets and wrap up tightly in the foil. Steam the parcels in a steamer basket over simmering water for 10-12 minutes until the fish is cooked. Steam the pak choi in another basket over the salmon until wilted and tender (about 6 minutes). Toss with the sesame oil, seeds and season. Serve alongside the fish parcels.