Preheat the oven to 200C or 350F. Line a baking tray with baking paper.
Spread the sweet potato across the tray and drizzle the oil over the top. Season with sea salt and black pepper. Bake in the preheated oven for 30 minutes or until golden and cooked through.
Whilst the sweet potato is cooking, cook the quinoa as per the packet instructions.
To make the dressing, combine all of the ingredients in a jar and whisk to combine. Season to taste with sea salt and black pepper.