Preheat the oven to 220°C (428°F).
Cut the sweet potatoes in half lengthwise, place them between two chopsticks, and score them crosswise. The chopsticks will prevent you from cutting all the way through. You can watch the process in the video.
Brush the sweet potatoes with oil, and sprinkle with salt, granulated garlic, and smoked paprika. Bake for about 30 minutes.
Mix the yogurt with minced garlic and salt.
Finely chop the herbs.
Spread the yogurt on a serving plate, sprinkle the herbs on top, and drizzle with olive oil and lemon juice.
Place the sweet potato halves on top and sprinkle with chili flakes/sesame seeds/black cumin.