In a large bowl, combine the flour, yeast, sugar, and salt. Whisk together until combined.
Heat the water, milk, and butter in a small saucepan over medium heat until the butter is melted and the mixture is hot (but not boiling).
Pour the hot liquid into the dry ingredients and mix with a wooden spoon until combined.
Beat in the eggs one at a time, stirring until each egg is fully incorporated before adding the next. Once all of the eggs have been added, knead the dough until it is soft and elastic.
Cover the bowl and let the dough rise in a warm place for 1 hour.
Meanwhile, prepare the filling by browning the ground beef and onion in a large skillet over medium-high heat. Once cooked through, add the salt and white pepper.
Once the dough has finished rising, turn it out onto a lightly floured surface and roll it out into a large rectangle into a circle, about ¼-inch thick.
Spread the cooked meat mixture over the dough, leaving about an inch of space around all edges. Sprinkle with the cooked cabbage.
Beginning at one end, roll the dough up tightly into a round shape. Place them onto a parchment-lined baking sheet.
Bake in a preheated 375°F oven for 25 to 30 minutes, or until golden brown.
Serve warm with your favorite dipping sauce.