To make in advance, make the miso orange glaze and brush the salmon fillets (flesh side only) with a coating of the glaze. Cover and leave overnight (optional).
To make the glaze, place all the ingredients in a small pot and heat over a low flame. Whisk in the miso paste and bring it to a gentle boil for about a minute. Remove from heat. It will thicken slightly as it cools.
Preheat your oven to 180C and make your glaze if you have not already pre marinated it.
When the oven is at temperature, heat a non-stick frying pan or an ovenproof skillet to hot. Rub a little olive oil onto the skin of the salmon and season the fish with salt and pepper. Fry the fillets skin side down for about 3 – 4 minutes and until the skin is golden and crispy.
Brush another generous layer of glaze over each fillet (flesh side) and place the pan in the oven (flesh side facing up), or transfer the fillets on to a baking sheet lined with baking paper and roast for about 12- 15 minutes until cooked through. Brush the salmon with another layer of miso glaze about halfway through baking, reserving any remaining sauce to serve.
Serving suggestion: French fries, sweet potato fries with lemon salt and a light salad such as fennel and radish with a lemon juice and olive oil