Prepare the marinade by putting the following in a small oven dish: grated onions, finely chopped green onions, a pinch of savory, pinch of black pepper, pinch of paprika and pinch of sugar. Stir and pour the soy sauce and water over them, then stir again.
After you've prepared the marinade, make cuts all over the piece of meat with a small knife (so it can take in the marinade better) and put it in the marinade.
Leave it in the fridge to marinate for at least 2 hours (if the meat isn't completely submerged in the marinade, turn it over after the first hour), then take the meat out and put it in a suitable oven dish, pour in 3-4 tbsp of the marinade over the meat.
Bake for about 60 min. in a moderate oven or until ready, while increasing the temperature in the last few min. to obtain a crunchy crust. If necessary, add salt.