Rip the flatbread into pieces and soak in the milk for 10 minutes. Then put the bread into a mixing bowl, add the mince and stir in the parsley, mint, oregano, garlic and some seasoning.
Mix well, then roll the mixture into walnut-sized balls.
On a griddle pan, brown the balls quickly - it's all about colouring them and not cooking them through ... five minutes total cooking time with about three turns on the griddle.
To make the sauce, heat the olive oil in a heavy-bottomed pan and gently fry the crushed garlic. Tip in the chopped tomatoes and harissa and simmer for 25-30 minutes, until the sauce has reduced. Put in the meatballs and continue to simmer for a further 20 minutes with a lid on until the sauce looks about right.
Lastly, stir in the herbs and have a final seasoning check.