In a large bowl, combine the warm water, yeast and sugar. Stir a few times then let sit for 5 minutes.

Add all flour, salt and olive oil. Stir until a dough comes together.

Once the dough comes together, transfer to a floured surface and knead the dough until smooth, usually it takes about 5 minutes. Transfer to a large oiled bowl, cover with a warm, damp towel and let rise for 1 to 1.5 hours.

Transfer the dough onto the baking sheet (well floured or lined with parchment paper) then gently stretch and press it down into the baking sheet.

Preheat oven to 355F (180C).

Let the dough (covered) rise again for 20 to 30 minutes.

Use your fingers to dimple the dough then drizzle with olive oil.

Add all your toppings, slightly press them into the dough. Sprinkle with course sea salt and then bake until golden brown, 25 to 35 minutes.

Cool baked focaccia bread on a wire rack.