To the bowl of a stand mixer with a dough hook, add all of the bread dough ingredients, except for the raisins, vanilla and boiling water, and mix on low speed for 10 minutes.

Place the dough in a lightly greased bowl, cover with a plastic cover and leave to rest for 15 minutes.

While the dough is resting, pour boiling water, raisins and vanilla into a small bowl. Leave them to soak.

After 15 minutes, drain and dry the raisins. Remove the dough cover and pour the raisins on top of the dough.

With slightly wet fingers, take a piece of the bread dough, pull it upwards, and fold it towards the center of the dough.

Push the heel of your hand into the dough. Turn the bowl clockwise a quarter turn and repeat the same motion.

Continue to knead the dough for about 20 seconds.

Cover the dough again and wait until it doubles in size, typically 30-45 minutes more.

Once the dough has doubled in size, punch it down to remove all of the air bubbles.

Stretch or roll the bread dough into a large rectangle with a rolling pin, about 8 inch x 12 inch.

With a pastry brush, brush water about 1 inch wide along the sides and 2 inches wide along the top and bottom of the rectangle.

In a small bowl, whisk together the sugar, cinnamon and flour. Sprinkle the rest of the dough with the cinnamon-sugar mixture, avoiding the wet edges.

Starting with the side closest to you, tightly roll the bread dough into a log, like you would a cinnamon roll.

Curl the ends of the sourdough sandwich bread under itself and pinch the seams together.

Gently lift the dough and place it into a greased 8.5 x 4.5-inch loaf pan with the seam side down.

Cover the dough with a plastic cover and allow it to rise until the dough is 1" above the rim of the pan and looks puffy.

While the dough is rising, preheat the oven to 375 degree F.

Bake for 50-55 minutes or until the top is golden brown and the internal temperature has reached 195 degrees F.

Remove the loaf from the hot oven and keep in the loaf pan for 5 minutes, before removing to cool on a wire rack.