Mix yeast and a pinch of sugar into warm water. Allow to rest for 10 minutes.
Meanwhile, add sugar, salt, and 4 cups flour to the large mixing bowl of a stand mixer. Install the dough hook.
Make a hollow in the center of the flour. Add 1/4 cup yeast mixture and begin mixing at a low speed. Add oil and gradually add remaining yeast mixture.
When thourouly mixed, the dough will be wet and sticky. Continue mixing while adding 1/4 cup of the remaining flour at a time. When the dough forms a moist ball, you know that you have added enough flour. You may not need the entire 6 cups, or you may need a bit more.
Pour the olive oil into a large mixing bowl and transfer the dough to the bowl. Roll the dough in the oil to cover. Then cover the bowl with plastic wrap. Allow to rise for 1 hour.
After 1 hour, transfer the dough to a lightly floured surface. Divide the dough into two equal halves. Pat each half into a rectangle or cylinder shape. Starting from a narrow end, pull the dough upward and onto itself. This process should create a cylinder perpendicular to the original shape.
Oil the loaf pans with cooking spray. If your cylinder is longer than your pan, gently pat the ends to shorten it. Place it in the loaf pan seam-side down and cover with plastic wrap. Allow the dough to rise for 1 hour.
Preheat the oven to 375 Fahrenheit. Bake for 30 to 35 minutes. Remove from oven, let cool, and slice.