In a small bowl, combine warm water and active dry yeast, then let it sit for 5 minutes until foamy.
In a large mixing bowl, whisk together bread flour, vital wheat gluten, sea salt, and finely chopped fresh rosemary.
Mince the garlic cloves and stir them into the dry flour mixture until evenly distributed.
Create a well in the center of the dry ingredients and pour in the yeast mixture, egg white, and olive oil.
Stir the mixture until a shaggy dough forms, then turn it onto a lightly floured surface and knead for 8-10 minutes until smooth and elastic.
Place the dough in a lightly oiled bowl, cover with a damp cloth, and let it rise in a warm, draft-free spot for 1 hour.
Preheat your oven to 400 degrees Fahrenheit and place a cast iron skillet or baking stone inside to heat up.
Shape the risen dough into a round loaf, score the top with a sharp knife, and carefully transfer it into the hot skillet.
Bake for 25-30 minutes until the crust is a deep golden brown and the loaf sounds hollow when tapped on the bottom.