These keftas can be either roasted or grilled. If roasting, preheat the oven to 375°F and line a baking sheet with parchment paper. If grilling, preheat a grill to 350°F-400°F and soak 4 to 6 wooden skewers in water for at least 15 minutes so they don’t burn on the grill. (Alternatively, you can use metal skewers.)
In a large bowl, whisk the egg. Add the walnuts, currants, beef, parsley, garam masala, cinnamon, cumin, salt and pepper. Mix together until combined. It’s easiest if you use your hands to do this.
Roasting Method: Form 3 tbsp of the mixture into a football-shaped kefta. Place on the prepared baking sheet. Repeat with the remaining mixture. Bake for 20 minutes, then flip and bake for 10 minutes more, until an inserted meat thermometer reads 160°F and the keftas are browned.Grilling Method: Shape the meat around the skewers into any shape you want – long logs or football-like shapes. Place the skewers on the grill and every few minutes flip using tongs. Cook for about 10 to 15 minutes, until browned or until a meat thermometer inserted into the center of a kefta reads 160°F. Prepare the sauce by combining the tahini, lemon juice, cold water and salt in a bowl. Whisk until smooth and runny.
To serve, drizzle with the yogurt and sprinkle with the parsley and pomegranate seeds, if you like. Drizzle the tahini sauce overtop. Store leftovers in an airtight container in the fridge for up to 4 days.