Sweet potato steaks

Bahan-bahan (2 porsi)

• 1 g igantic sweet potato - to cut 2 x “steaks” (1.8 cm thick, 17 cm long, 7 cm wide (0.7 x 6.5 x 2.75") - Note 1)
• 2 - 3 tsp olive oil
• 1 1/2 tsp smoked paprika ((sub ordinary))
• 1/2 tsp onion powder ((or more garlic powder))
• 1/2 tsp garlic powder ((or more onion powder))
• 1/4 tsp cumin powder
• 1/2 tsp cooking/kosher salt
• 1/4 tsp black pepper
• 1 cup plain yogurt ((250g))
• 2 1/2 tbsp tahini ((Note 2))
• 1 1/2 tbsp lemon juice
• 1 g arlic clove (, finely grated)
• 1/2 tsp cooking/kosher salt
• 2 tbsp extra virgin olive oil
• 3 g arlic cloves (, finely minced)
• 1 1/2 tbsp eschallot ((US: shallot), finely chopped (Note 3))
• 1 tbsp red cayenne pepper (, deseeded, finely chopped (not spicy, Note 4))
• 1 tbsp green cayenne pepper (, deseeded, finely chopped (not spicy, Note 4))
• 1 tbsp white sesame seeds
• 2 tbsp pine nuts (, toasted)
• 2 tbsp coriander/cilantro leaves (, finely chopped)
• Pinch of sumac (, optional (or paprika))
• Pita or lebanese bread (, toasted (Note 5))