In a small bowl, dissolve the yeast and sugar in the water. Set aside for 10 minutes until the yeast is foamy. If it doesn't foam, the yeast is dead and you should discard it. If you are using instant dry yeast, you can just mix it with water and sugar and use without waiting the additional minutes. It doesn't require proofing.
In a large bowl, sift in the flour and salt. Make a well in the center and gradually pour in the water and yeast mixture. Form the dough into a ball. Put on floured surface and knead for 10-15 minutes until smooth and elastic. Divide the dough into two even pieces and shape into slightly flattened balls. Dust lightly with flour. Cover with a kitchen cloth and let rest for about 10 minutes.
Line a baking sheet with parchment paper. Transfer the loaves to the sheet, leaving at least 2 inches (5cm) between them. Flatten to about 1 inch (2.5 cm) thick with your hand. Cover with a plastic wrap, and leave in a warm place for about 1 hour. The dough should rise.
Preheat the oven to 350°F (175°C). Prick the loaves 4-5 times using a fork or a knife. Sprinkle with cornmeal, if desired. Bake until golden, for about 25 minutes. Rotate the pan halfway through baking. Store wrapped in plastic wrap. Enjoy!