Mastika Peshtera is a Bulgarian aniseed liqueur sometimes called the Bulgarian Ouzo.
You can see the Turkic origin ethnic origins of the Bulgars on the table. Some type of meat on skewers similar to Turkish Köfte, there is a dairy dribk, perhaps kefir or drinking yogurt. Bulgaria is the country that introduced yogurt to the Western World and many people there still make their own at home every day. And there is a jar with some kind of pickled vegetables. It was the Turkic people who developed this way of food preservation and took it with them to Korea (kimchi), to Russia and to Germany (sauerkraut).
Bulgars were a multi-ethnic confederation that fought with Khazars, was conquered by the Khazar empire and then freed from the Khazars when the Slavic Rus attacked and destroyed Atil, the Khazar capital. Bulagrs were ruled by a Turkic tribe when they settled in the Balkans, but among them were Iranian peoples like Pashto, and Slavs and others. Their language eventually settled on an Iranian Slavic dialect which we now call Bulgarian.
They had a very large influence on Russian language and culture because the Bulgar were more educated, accepted Christianity first and then spread it into Russia. Like English where learned words have a Latin origin and common ones have a German origin, in Russian, learned words have an Old Bulgarian origin and common ones are from a more pure Slavic origin. The Old Bulgarian language is still used in the Orthodox churches where it is called Old Church Slavonic.
Bulgaria is a great country to visit because it is so rich in ancient folklore. Make sure to get away from the coastal beaches and explore a bit. Great weather in the summer.