1In a bowl, combine flour, yeast, and kosher salt. Add warm water and 2 tablespoons olive oil; stir until shaggy dough forms. Knead briefly by hand in the bowl for 2 minutes until smooth.
2Heat oven to 475°F. Stretch dough into an oval or rectangle about 1/4 inch thick on a rimmed sheet pan or directly on the pan if it's oiled lightly.
3Bake for 8–10 minutes until the bottom is set and just beginning to color.
4Remove from oven. Tear fresh mozzarella into small clumps and scatter over the hot dough. Distribute halved cherry tomatoes evenly.
5Return to oven for 3–4 minutes, just until cheese softens and tomatoes begin to blister.
6Top with fresh basil leaves, a pinch of fleur de sel, a crack of black pepper, and a thin drizzle of good olive oil.