How Egyptians make the Juiciest Kebabs

One of the best grilled foods of all time is kofta, a juicy mix of meat, onion and herbs packed full of flavour. These Egyptian koftas are incredibly moist and flavourful, and when you combine them with tahini sauce, they are an S-Tier combination.
Kofta:
1.5 kg Minced meat 30% fat (lamb, beef or a mix of both is recommended)
3 Tsp Salt
2.5 Tsp Black Pepper
1/2 Tsp Cayenne Pepper
160g Drained grated onion from (requires 2 medium onions to make)
25g Parsley, after removing the stems this should be roughly 13g of leaves

Tahini Sauce:
75g Yoghurt
50g Tahini Paste
50ml Water
20ml Lemon Juice
1/4 Tsp Salt
1/4 Tsp Black Pepper
1/4 Tsp Chilli Powder
1/4 Tsp Ground Cumin