Combine the yeast, sugar, and warm water in the bowl of a stand mixer fitted with a dough hook. Allow to sit for five (5) minutes, till foamy and creamy.
To the yeast mixture, add 2 cups of the flour, along with the oil and salt. Combine at low speed for one (1) minute.
Gradually add the remaining cup of flour until the dough begins to leave the sides of the bowl and pull together. If you need a little more or less flour than the three cups, that's fine. When enough flour has been added, the dough will look and feel soft and smooth. It shouldn't be sticky or overly dry and rough.
Increase the speed to medium, and beat for five (5) minutes.
Remove the bowl from the stand and cover with plastic wrap. Let it rise till doubled in size. This will take about 30 minutes in a warm place (around 85°F), or a bit longer in a cooler spot.
After it has risen, punch the dough down and let it rest for 10 minutes.
Next, turn the dough out onto a lightly floured surface and shape it into a loaf about 12 inches long.
Place the loaf on a lightly greased baking sheet and, using a sharp paring knife, cut three 1/4-inch deep slits across the top. This will give interior steam a place to escape and prevent your loaf from blowing apart at the sides.
Bake at 400°F for 14-16 minutes or until golden brown. Cool on a wire rack.