Preheat oven to 400°F (200°C). Rub the salmon with melted ghee and season with salt and pepper.
Place salmon skin-side down on a baking tray, and pour the lemon juice over the top. Bake for 10-12 minutes, until cooked through.
In the meantime, make the dressing by whisking together all the dressing ingredients.
Prepare the salad by dividing the iceberg lettuce between 2 bowls, top with cooked couscous, red onion, tomatoes, and feta cheese.
Once salmon is cooked, remove from oven and place on top of the salad. Drizzle with the dressing and serve.