In a medium bowl, whisk together the flour, yeast, and salt.
Add the buttermilk and 1 tablespoon of butter. Stir with a spatula until a dough forms, then shape it into a small ball. Cover and let it rest in a warm place for about 1 hour.
Once the dough has doubled in size, transfer it to a floured surface. Using a rolling pin, roll it out into a 16x10-inch rectangle.
Preheat the oven to 350°F (175°C).
In a separate bowl, mix the remaining butter with freshly chopped garlic and parsley. Spread this mixture evenly over the dough using a fork or knife. Then, roll the dough into a log.
Slice the dough log in half lengthwise and braid the two pieces together. Coil one end like a snake and twist the other end in the opposite direction. Place the shaped dough into a medium loaf pan.