Start about two hours before dinner.
Mix dough. Ideally let sit to autolyse ~20min. Knead. Cover bowl with damp towel, set to rise in a warm location for 45-60min or until ~2x.
Spread dough over large baking sheet. Cover again, let rise ~20min.
Preheat oven to 400 F. Poke holes with fingers. Brush on oil, add salt
and rosemary. Bake ~20min.