Put 10g butter in a bowl to soften. Preheat the oven to 220C, fan-forced. Line 2 oven trays with baking paper. Quarter the unpeeled potatoes. Thinly slice the onion. Put the potato and onion on a lined tray. Drizzle with 2 tsp olive oil and season with salt and pepper. Roast for 25 mins or until the potato is golden and tender and the onion is caramelised.
Step 2 — Make curry butter
Meanwhile, crush or finely chop 1 garlic clove. Add the garlic and curry paste to the butter, season with salt and pepper and stir to combine.
Step 3 — Roast salmon
Put the salmon, skin-side down, on the remaining lined tray. Spread the curry butter over the top of the salmon. Roast for 5 mins or until just cooked or cooked to your liking.
Step 4 — Make creamy cucumber
While the salmon is roasting, pick the coriander leaves, discarding the stems. Thinly slice the cucumber (see Make it yours). Combine 1 tbs mayonnaise and 1½ tsp white vinegar in a large bowl and season with salt and pepper. Add the cucumber and toss to coat.
Step 5 — Serve up
Divide the salmon, roasted veggies and cucumber among plates and drizzle the salmon with any tray juices. Scatter over the coriander and enjoy!
Step 6 — Make it yours
We've sliced the cucumber and tossed it in mayonnaise for a twist on the classic raita. Feel free to coarsely grate the cucumber and stir it through plain yoghurt instead.