Roast salmon with rye & horseradish crumble & kale salsa verde

Heat oven to 160C/140C fan/gas 4. To make the crumble, mix the crumbs, onion flakes, herbs, horseradish, 1 tsp salt and melted butter together, then set aside. Line a baking tray with baking parchment, scatter over the sliced onions and drizzle with cider. Sprinkle with a little salt and lay the salmon on top, skin-side up. Loosely pack over the crumble mix. Roast in the oven for 20 mins, or until just cooked through.