Take flour, salt and baking soda in a large bowl. Whisk well to combine. Mix buttermilk and water together.
Now, slowly add the liquid to the flour mix and start kneading. The dough will be pretty messy to start with.
Knead on the dough till it becomes pliable and easy to handle. Let the dough rest for 30 minutes.
Flour the work surface generously, divide the dough into 5 portions. Take a portion of dough and roll it out into a circle of 5 - 6 inches.
Keep 2 tbsp of stuffing in the center of the rolled dough. Bring the edges together and close and roll it again to form a circle. Be gentle while rolling, ensuring the stuffing doesn't come out.
Heat a nonstick pan, grease with butter, place the stuffed placinta on the hot pan, and cook for a minute or until the sides are brown. Flip and cook the other side until brown.
Serve hot with cream cheese or as I did with garlic mayo.