Combine Dry Ingredients: In a large mixing bowl, whisk together 4 cups of all-purpose flour, 2 teaspoons of salt, and 2 teaspoons of instant yeast until well combined. Gradually add 1/4 cup of olive oil and 1 and 1/2 cups of warm water (approximately 110°F), stirring with a wooden spoon until a sticky dough begins to form.

Let the Dough Rise: Cover the bowl with a clean kitchen towel or plastic wrap, and allow the dough to rise in a warm area for about 1 to 2 hours, or until it has doubled in size.

Prepare the Baking Dish: Preheat your oven to 425°F (220°C). Grease a 9x13-inch baking dish with olive oil to prevent sticking. Once the dough has doubled, gently punch it down and transfer it to the prepared baking dish. Stretch and shape the dough to fit the pan evenly.

Second Rise: Cover the stretched dough with the kitchen towel again and let it rest for an additional 30 minutes.

Infuse Garlic Oil: In a small saucepan, heat 1/4 cup of olive oil over medium heat. Add 3 cloves of minced garlic and cook gently until fragrant—about 2-3 minutes. Remove from heat and set aside to cool slightly.

Dimple and Top the Dough: Once the dough has risen again, create deep dimples all over the surface. Pour the cooled garlic oil over the top, then sprinkle generously with 1 cup of grated Parmesan cheese.

Bake the Focaccia: Place the baking dish in the preheated oven and bake for 20 to 25 minutes, or until the focaccia turns a golden brown.

Cool and Serve: Once baked, remove the focaccia from the oven and let it cool in the pan for about 10 minutes. Afterward, cut it into squares or strips, and serve warm.