Buttermilk Cinnamon Roll

2 TBS yeast
1 egg
1 1/2 Cups buttermilk
1/2 Cup vegetable oil
1/4 Cup sugar
1 tsp salt
1/2 tsp baking soda
4 1/2 Cups flour

Filing Ingredients
1/2 Cup butter softened
1 1/4 cups brown sugar
1 1/2 tsp cinnamon

Warm buttermilk until warm to the touch. Put yeast, salt, sugar and baking soda into a large bowl. Add egg, vegetable oil and buttermilk - mix well. Gradually add flour 1 cup at a time until a soft dough forms. Turn dough out onto a lightly floured surface and knead 20 times. Cover and let rest for 15 minutes.
On a lightly floured surface, roll dough out into a large rectangle. Spread softened butter and sprinkle cinnamon and brown sugar liberally over the rectangle. Roll up into a log and pinch the seam to seal. Slice into 1 inch pieces and place on a lightly greased 10 x 15 baking pan or baking sheet. Cover and let rise until double. Bake at 375 for 20 to 25 minutes or until golden brown.