Combine yeast and water in a bowl, then stir in the flour and salt until a wet, sticky dough forms.
Cover the bowl with cling film and let the dough rise in a warm place for 2 hours.
Drizzle half the olive oil into an 8x8 inch baking tin, spreading it well to cover the bottom and sides.
Transfer the dough into the tin, spreading it out gently toward the edges without forcing it.
Cover and let rise for another hour; meanwhile, preheat your oven to 220°C.
Drizzle the remaining oil over the dough and use your fingers to poke deep dimples across the entire surface.
Add your desired toppings, such as rosemary and tomatoes, pressing them slightly into the dough.
Bake for 20–25 minutes until the top is golden brown, then cool completely before slicing.