Making Garlic Parmesan Focaccia is straightforward when you follow these simple steps:

1. Prepare the Yeast: In a bowl, combine warm water and yeast. Let it sit for about 5-10 minutes until frothy.
2. Mix Dry Ingredients: In a large mixing bowl, whisk together the flour and salt.
3. Combine Ingredients: Pour the yeast mixture into the flour mixture. Add olive oil, minced garlic, and black pepper. Mix until a shaggy dough forms.
4. Knead the Dough: Transfer the dough onto a floured surface and knead for about 5-7 minutes until smooth and elastic.
5. First Rise: Place the dough in a greased bowl, cover with a damp cloth, and let it rise in a warm place for 1 hour or until doubled in size.
6. Prepare the Baking Pan: Grease a 9×13 inch baking pan with olive oil.
7. Shape the Dough: After the dough has risen, gently punch it down and transfer it to the prepared pan. Stretch the dough to fit the pan.
8. Second Rise: Cover the dough again and let it rise for an additional 30 minutes.
9. Preheat the Oven: Start preheating your oven to 425°F (220°C).
10. Add Toppings: Once the dough has risen, drizzle olive oil over the top. Use your fingers to dimple the surface, then sprinkle with Parmesan cheese, rosemary (if using), and coarse sea salt.
11. Bake: Place the focaccia in the preheated oven and bake for 25-30 minutes or until golden brown.
12. Cool Down: Remove from the oven and let cool for 10-15 minutes before slicing.

Each of these steps builds upon the last, ensuring you create a focaccia that is not only delicious but also visually stunning.