Preheat oven to 400°F/200°C.
Separate the dough into 4-6 equal pieces.
Line a sheet pan with parchment paper; set aside.
On a lightly floured surface, roll each piece of dough into a thin circle using a rolling pin.
Using your fingers, roll and press two opposite sides of the circle a few inches into the center, building up the sides. Next, press and pinch the narrow ends together to form two points. This will create an oval boat with an eye-like shape. Place the Khachapuri on the prepared sheet tray.
Generously spread tomato sauce into the center of each dough boat, spreading it into an even layer.
Brush the sides of Khachapuri with water and sprinkle some sesame seeds.