Boza is a drink that people have been making for a long, long time. It's a bit like a thick, sweet, and tangy milkshake that you can drink.
Basically, it's made by taking grains like millet, barley, or corn and soaking them in water. Then, the water is boiled, and sometimes some sugar is added to make it sweet. After that, a special type of bacteria is added to the mixture, which helps change it into Boza.
The bacteria works a bit like little factories inside the drink, turning the sugar and grain into something different. That's what gives it that tangy taste. The longer the bacteria works, the thicker and tangier the Boza gets!
It might sound a bit strange, but lots of people really like Boza. They might drink it on hot days to feel refreshed, or sometimes it's used in desserts or even eaten like a soup. Some people even say that it's good for your digestion!
So, in simple terms, Boza is a sweet and slightly sour drink made from grains and special bacteria that makes it thick and tangy.