To re-create this, simply cut a medium-sized sweet potato into fries. Lay onto a baking tray. Drizzle with olive oil. Season. Sprinkle over 1/2 tsp ground cumin, 1/2 tsp turmeric and 1/2 tsp curry powder if you have it. Cook in an oven pre-heated to 220'C for about 40 minutes, turning halfway through.