Preheat the oven to 500°F (260°C).
In a bowl, mix together the ground beef, parsley, onion, and spices until well combined.
Lightly oil a baking dish or cast iron pan. Shape the kafta mixture — either spread it flat in the dish, form it into patties, or make small meatballs.
Prepare the potatoes: peel, wash, and slice them into thin rounds so they cook faster. You can also cut them into cubes if you prefer.
Arrange the potatoes over the kafta. Bake until the meat is fully cooked and the potatoes start turning golden. If needed, broil for a few minutes to get that perfect color.
(Alternatively, you can fry or air-fry the potatoes separately before layering them.)
Make the tahini sauce: in a bowl, whisk together tahini, warm water, lemon juice, minced garlic, salt, and spices. The sauce should be slightly runny — it will thicken as it sits and even more once baked.
Remove the kafta and potatoes from the oven, pour the tahini sauce evenly on top, then return to the oven and bake for another 5-minutes or until the sauce start bubbling.
(You can also simmer it on the stovetop if you prefer.)
Toast the pine nuts in a bit of oil until golden. Sprinkle them over the dish, then garnish with fresh parsley.
Serve warm with vermicelli rice and enjoy!