Did this yesterday. Turned out really good. It’s basically a combination of a meatballs recipe, but with olives+tomator sauce.
The sauce is based on 5 tomatoes, minced garlic, minced onions, tyme, 1 red bellpeper, one chilly-pepper and ofcourse, olives :).
Get canned olives without the pips, put them in a pot with water and 1 quarter of a lemon. Let it boil, then rinse the water, put back fresh water and a new quarter of a lemon. Let it boil again, rinse again, boil again. Repeat the process a third time. The purpose is to get the bitterness out of the olives before cooking.
For the meatballs, basically some good ground beef/lamb with chopped coriander and added greens to your liking. My butcher suggested the entrecôte cover which was fatty and delicious. I added a tiny bit of mint, I liked it, the wife didn’t. Also added a bit of thyme, 3 garlic heads, half a small onion and 2 egg yokes. The original recipe adds 3/4 cup of bread crumbs, so I used almond crumbs instead.
Massage the meat well. Then let it cool in the refrigerator while working on the sauce.
For the sauce, use coconut oil, start with quarter of an onion and 3 garlic heads (chopped), then add the bell pepper and the tomatoes. Add 3 tbsp of tomato paste and other ingredients to your liking. Then add the olives.
Cook for 40 minutes.
Get the meat and make small ping-pong sized meatballs with your hands. I made mine too big, will improve next time. Still, they tasted good.
Place the balls in the pot in an orderly fashion. Once done, slightly tilt the pot to get the juices over the meatballs. DO NOT STIR with a cooking spoon as it may break apart the meatballs.
Cook for another 20 minutes. I turned the meatballs over halfway but I don’t think it’s necessary.
Although they turned out nicely, I wanted them to be a little more brown/crisp so after 20 minutes I took them out, fried them slightly on a pan until they got darker and put them back in the pot for 5-6 minutes.
I had some leftover meat so I turned that into a hamburger 
You can keep the pot in the fridge for about 3-4 days.
Good luck!