Grease a 13x9-inch metal baking pan with 1 1/2 tablespoons olive oil.

In the bowl of a stand mixer fitted with the paddle attachment, combine the warm water, 3 tablespoons olive oil, salt, flour and yeast. Beat on medium speed for 1 minute just until combined.

Scoop the batter (it will be very sticky) into the prepared pan. Cover the pan with plastic wrap and let it rest at room temperature for 1 hour until it has puffed.

Preheat the oven to 375ºF. Poke the dough all over with your fingers then drizzle the top of it with 2 tablespoons of olive oil. Bake the focaccia for 20 to 25 minutes until golden brown then remove it from the oven and allow it to cool for 5 minutes still in the pan.

Transfer the focaccia bread from the pan onto a baking sheet lined with parchment paper. Top the focaccia with the marinara sauce, cheese and pizza toppings. Return the focaccia to the oven for an additional 5 minutes until the cheese is melted. Slice and serve immediately.

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