To make the meatballs, mix all the ingredients in a bowl, with a light hand until just combined, and shape into slightly larger than walnut-sized meatballs
Heat the oil on a medium flam till hot but not smoking, add a few meatballs to the pan, leaving adequate space between them and sear, turning them every few seconds till they are lightly browned on all sides. Set aside and sear the remaining meatballs the same way.
Add butter to the same pan, turn the heat low and add the garlic. chilli flakes and oregano. Cook for a couple of seconds.
Put in the tomato paste and mix well. Add the chicken stock and stir to dissolve the tomato paste. Cook for 3-4 min till the sauce is not runny and a little reduced
Pour in the cream and gently mix. Check the seasoning and add salt if required (chicken cubes can be quite salty). Simmer for a couple of minutes.
Add the meatballs and any juices that may have collected on the plate. Let the meatballs simmer in the sauce for 5-7 mins till they're no longer pink inside. Take the pan off the heat, sprinkle fresh basil or mint leaves over and serve warm.