Authentic Traditional Irish Soda Bread

4 C Unbleached Flour
1 tsp Baking Soda
1 tsp Salt
14 oz Buttermilk

Preheat oven to 425 degrees.  Grease a Dutch oven and place it in oven for about 15 minutes while you make the dough.
Sift flour, baking soda and salt together.  Slowly add the buttermilk a little at a time with a wooden spoon. 
Turn out on floured cutting board and knead a little (not too much).
Form the dough into a ball and flatten to a disc shape.  Dip knife in flour and make a large X on the top. 
Place in Dutch oven and cover with lid and bake for about 30 minutes. 
Remove the lid and bake an additional 15 minutes.