Preheat oven to 450 degrees
Toss potatoes in oil and salt and put in the oven for 10 minutes on each side on baking sheet sprayed in oil
Lower heat to 375
In food processor or grater pulse onion and parsley or chop finely
Mix with your hands long enough for all the flavors to really mix together (1-2 minutes)
Using your hands make round balls then press them so they long and are fingerlike length and form kabob shape. Put in the fridge for 5 -10 minutes at least and up to a day
Using either vegetable oil or sunflower oil sautee the kabobs in a frying pan. Sautee them about 5-6 minutes so they are brown on the outside but still slightly rare on the inside (we're going to put them back in the oven so you don't want them to overcook but instead finish cooking in the oven)
Place onion discs on the bottom of a pyrex, top with kabobs, and pour tahini sauce over
Cover in the oven for 25 minutes. Remove cover, add potatoes and put back in the oven for additional 10 minutes or until kofta is cooked through
Garnish with parsley, paprika, and/or pine nuts
Serve with rice or pita bread
Whisk together tahini, juice of lemon and salt. Gradually add water so it is a thick creamy consistency. Adjust lemon and salt to taste.