Bulgaria is the home of the lactic acid bacterium Bacillus Bulgaricus, that is derived from lamb glands. It has gained a legendary stature as a means to longevity. Home-made yoghurt is more suitable for this recipe, yet if the yoghurt is thin, dilute it with less water than indicated. Mix all ingredients in a kitchen robot and serve cool.
Wash the lentils and put in a pot. Add the onions, cut in small pieces, the carrots and celery, cut in cubes. Add the oil, the garlic, cut in slices and the savory. Pour cold water over everything and put to boil at medium fire. 10 minutes before the lentils is ready, add the red tomatoes, cut in small pieces. Flavour the ready soup with salt and vinegar. Before serving sprinkle with finely-cut parsley.
*Add the milk and burble for 5 mins.