2 Tbsp good quality olive oil, plus more for the pan and to paint on top of the bread
3 cups bread flour
4 1/2 cups all-purpose flour
1 Tbsp salt, plus coarse salt (fleur de sel if you have it, otherwise Kosher salt) for sprinkling over the top
2-3 Tbsp finely chopped fresh rosemary (can use sage or other herbs such as thyme or oregano, but whatever herb you use, do use fresh herbs, do not use dried)