In a large bowl, combine the starter, milk and yogurt until combined.

Whisk in the flour, baking powder and salt.

Turn out onto a floured surface and knead a few times until smooth.

Cover with a cloth and allow to rest while you prepare the filling of your choice.

Divide the dough into 4-6 equally sized balls (4 for bigger servings or 6 for smaller).

Working with one ball at a time, use your fingers to press the dough out until you get a decent sized circle - you don't want the dough to be too thin or it will tear, and you don't want it to be too thick or it won't cook all the way. Repeat with remaining dough.

Divide the filling between each round, only placing it on one half of each circle.

Fold the empty half of the dough circle over the filling to make a half moon shape.

Press and seal the edges together.

On a hot skillet, melt a bit of butter and place one gozleme at a time.

Allow to cook for 2-3 minutes on each side (adding a new pat of butter when you flip), or until golden brown on both sides.

Slice and Enjoy!