Warm the water to around 100 degrees and stir in the yeast

Add 2 3/4 cups of flour to a mixing bowl and make a depression in the flour

Add the yeast water, milk, oil and a raw egg.

You can add 1 teaspoon of sugar if you want your bread to have a golden color.

Mix the ingredients from the middle of the bowl until all the flour is mixed

The dough should be formed into a soft ball

Cover the bowl with plastic wrap and leave in a warm place for two hours to rise.

Preheat oven to 450 degrees

Add 1/2 cup of flour and knead the dough until it is soft and smooth

separate the dough into 2 pieces

on a floured surface roll out one piece of the dough into a circle about 11 "

Place the combination of seasoned cheese in the middle

Gather up the edges of the circle enclosing the cheese.

Flip over and roll out again to about a 9" diameter disc.

Transfer the khachapuri to a cookie sheet lined with parchment paper or a warm pizza stone

Repeat with the second part of the dough of freeze for later use.

Mix the egg yolk and water in a cup and brush the dough with the egg wash.

Bake for 18-20 minutes until golden brown.

Let cool for a few minutes and serve warm.