Soak the bread in milk. Process the chicken breast in a food processor together with the egg and the soaked bread.
Add seasoning and flour to the mixture, mix and shape into small meatballs with wet hands.
Arrange the meatballs on an oiled baking sheet and bake for 20 minutes at 180°C.
Meanwhile, finely chop the onion and grate the carrot. Sauté them in vegetable oil, adding garlic, seasoning and salt along the way.
Add the tomato paste and a little water if needed, and cook the sauté until nearly done.
Pour the sauce over the meatballs and bake for another 10 minutes. Top the finished dish generously with chopped herbs.