Soups with this flavour are called "Beppe's Soup" by the Bakker clan. Pake usually makes really small meatballs. The delicious flavour is a combination of the Dutch meatball spice and the Honing brand Spring Vegetable Soup mix. Maggi is also used to flavour it. My version is a little different from Beppe's but it is the same basic taste.
During the first years of our married life, whenever we had supper guests I would make, these meatballs and serve them with steamed rice, vegetables and a salad.