In a large mixing bowl, combine the flour, yeast, sugar and salt. Mix everything
Pour in the warm water and olive oil.
Mix until a sticky dough forms. Don’t worry if the dough feels very sticky—that’s normal.
Cover the bowl with a cloth or plastic wrap and let it rest for 30 minutes.
After resting, dip your hands in water to prevent sticking. Gently stretch the dough by taking from the sides of the bowl and folding it over itself, then rotate the bowl and repeat the stretching and folding process around the entire dough. This helps create a light, airy texture. Repeat this process of stretching and folding two more times, letting the dough rest for about 20 minutes between each stretch.
Preheat your oven to 420°F (215°C). Transfer the dough to a greased baking sheet. Use your fingertips to create dimples all over the surface.
Cover and let it rest for 10-15 minutes.
Spread the marinara sauce evenly over the dough, then sprinkle with grated Parmesan cheese.
Bake for 20-25 minutes until golden brown and crispy around the edges.
Let cool slightly before slicing and serving. Enjoy your homemade tomato and Parmesan focaccia!