In a bowl, combine warm water, sugar, and yeast. Let it sit for 5-10 minutes until frothy.
In a large mixing bowl, combine flour and salt.
Add the yeast mixture into the flour, mixing until a dough forms.
Knead the dough on a floured surface for about 10 minutes until smooth.
Place the dough in a greased bowl, cover it, and let it rise in a warm place for 1 hour.
Preheat your oven to its highest setting (usually around 475°F/245°C).
Roll out the dough on a floured surface to about 10-12 inches in diameter.
Spread crushed tomatoes evenly over the dough, leaving a small border.
Arrange mozzarella slices on top of the tomatoes.
Season with salt and pepper, drizzle with olive oil, and add fresh basil leaves.
Bake for 10-15 minutes until the crust is golden brown and cheese is bubbly.
Remove from the oven, let cool slightly, slice, and serve.