2torial #0473: Learn2 Make Pizza Dough (Continued)   Proof the Yeast The first thing is to pour the water (should feel lukewarm on the wrist) into the small bowl. Then: Add the pinch of sugar, if using (sugar helps get the process going).   Sprinkle the yeast into the water; no need to stir. In 5-10 minutes, the mixture should be foamy and aromatic. If not, the yeast is probably dead (but don't worry, death is common among yeasts). Wait another few minutes. If still no change, start all over again with a new package of yeast. Inactive yeast yields a disastrous dough. Step 2