As a reminder to the kosher consumer, all milk-containing breads need to be carefully distinguished by their shape or some marking so that you don't confuse them with pareve breads and serve them in error with meat meals.
Combine half of the flour, all of the sugar, salt, and baking soda in the work
bowl of a food processor fitted with the plastic blade.
In a small bowl, combine the warm water and yeast.
Add the water/yeast mixture to the work bowl with the motor running. Then add
the buttermilk to the work bowl. Mix for 30 seconds. Open the work bowl
and add the remaining flour. Mix until the dough forms a smooth ball on the
blade. Add additional flour if necessary.
Spray 3 loaf pans (8.5"x3") with Pam or other vegetable spray. Divide the dough into 3 elongated balls, and place in prepared pans. Cover with plastic, and let rise for 30 minutes. Bake for 25 minutes.