In a large, deep skillet or large, thick, uncovered Presto®-style pot, preheat oil over medium-high heat and sauté chopped vegetables for 5 minutes, stirring constantly.
Lower the heat to minimum, add water, mix and simmer while preparing the meatballs.
Wash the rice in cold water and drain.
In a bowl, combine the meat, rice, onion, 2 beaten eggs, parsley, salt and pepper. Mix well until well blended.
Form meatballs about 1/2-inch (1 cm) in diameter.
Add the meatballs to the broth.
Cook and heat over medium low for 1 hour. Mix from time to time.
Add the beaten egg yolks, lemon juice, lovage, salt and pepper. Mix for 1 minute.
Serve very hot. Optionally, add sour cream to taste when serving.