In a bowl, mix together the mince, egg, garlic, salt and pepper. Roll into small meatballs.
In a saucepan, boil 2 litres water, add the meatballs and cook 10 minutes. Meanwhile, saute the onions and carrots in vegetable oil.
To the soup add the browned vegetables, sliced potatoes and bay leaf. Simmer 10 minutes, then add the rice noodles and check for salt and pepper. Simmer another five minutes until noodles are done. Serve sprinkled with fresh herbs.