Preheat the oven to 400°F / 205° C. Chop the sweet potatoes into thin wedges, about 0.5 inch thick. Place on a baking tray and toss with olive oil, paprika, and cumin. Bake for 30 minutes until warm and toasted.
Make the tahini lemon sauce. In a bowl combine the tahini and lemon juice, along with a dash more of cumin and paprika. If the sauce is not runny enough, you can add more water or lemon juice. It should taste earthy with a citrus aftertaste.
Take the sweet potatoes out of oven and place on a serving tray. Drizzle the sauce on and garnish with parsley, salt, and pepper. Serve and enjoy!