Assemble Ankarsrum mixer with stainless steel bowl, and add 1½ cups (360 grams) hot water, kosher salt, and yeast. Attach dough roller and scraper, positioning dough roller just off side of bowl. With mixer on low speed (1 o’clock), gradually add flours. Increase mixer speed to medium-low (3 o’clock), and beat until a dough forms. Cover and let rest at room temperature for 30 minutes.
Reattach dough roller and scraper, positioning dough roller just off side of bowl. Beat at medium speed (4 o’clock) until a ball forms and dough is elastic and slightly sticky and pulls away from bottom of bowl, 15 to 18 minutes. Add all olives, lemon zest, and rosemary, and beat until completely incorporated, 3 to 5 minutes.
Place oiled hands underneath dough from both sides. Pull upward until dough folds in under itself, and set dough back down; rotate bowl 90 degrees. Repeat procedure until a smooth round forms. Remove dough from bowl, and lightly oil bowl. Return dough to bowl, turning to grease top. Cover and let rise in a warm, draft-free place (75°F/24°C) until doubled in size, 30 to 45 minutes.
Divide dough in half. Turn out half of dough onto a prepared pan, and shape into a ½-inch-thick oval (about 9x7 inches), making one short end wider than the other. Repeat with remaining dough on remaining prepared pan. Cover with lightly greased plastic wrap, and let rest at room temperature for 15 minutes.
Preheat oven to 450°F (220°C).
Brush dough with remaining 1 tablespoon (14 grams) oil. Using scissors, a bowl scraper, or a sharp paring knife, make 2 (2- to 3-inch) vertical cuts lengthwise down center of each shaped dough; make 5 diagonal cuts on each side of vertical cuts. Gently stretch dough to exaggerate cuts into larger openings. (The dough should be about 13x9 inches and resemble the shape of a leaf.) Sprinkle with sea salt (if using).
Bake until deep golden brown and an instant-read thermometer inserted in center registers 190°F (88°C), 10 to 15 minutes. Let cool on pans for 10 minutes. Remove from pans, and place on a wire rack. Serve warm or at room temperature. Store, covered, for up to 2 days.
Using a Conventional Mixer:
In the bowl of a stand mixer, whisk together flour, salt, and yeast by hand until combined. Add 1½ cups (360 grams) water; using the dough hook attachment, beat at low speed until a shaggy dough forms. Cover and let rest at room temperature for 30 minutes
Using the dough hook attachment, beat dough at medium-low speed until elastic and slightly sticky, pulls away from bottom and sides of bowl, and a ball forms, 15 to 20 minutes. Add olives, lemon zest, and rosemary, and beat until completely incorporated, 3 to 5 minutes.
Place oiled hands underneath dough from both sides. Pull upward until dough folds in under itself, and stir dough back down; rotate bowl 90 degrees. Repeat procedure until a smooth round forms. Remove dough from bowl, and lightly grease bowl. Return dough to bowl, turning to grease top. Cover and let rise in a warm, draft-free place (75°F/24°C) until doubled in size, 30 to 45 minutes.
Divide dough in half. Turn out half of dough onto a prepared pan, and shape into a ½-inch-thick oval (about 9x7 inches), making one short end wider than the other. Repeat with remaining dough on remaining prepared pan. Cover with lightly greased plastic wrap, and let rest at room temperature for 15 minutes.
Preheat oven to 450°F (220°C).
Brush dough with remaining 1 tablespoon (14 grams) oil. Using scissors, a bowl scraper, or a sharp paring knife, make 2 (2- to 3-inch) vertical cuts lengthwise down center of each shaped dough; make 5 diagonal cuts on each side of vertical cuts. Gently stretch dough to exaggerate cuts into larger openings. (The dough should be about 13x9 inches and resemble the shape of a leaf.) Sprinkle with sea salt (if using).
Bake until deep golden brown and an instant-read thermometer inserted in center registers 190°F (88°C), 10 to 15 minutes. Let cool on pans for 10 minutes. Remove from pans, and place on a wire rack. Serve warm or at room temperature. Store, covered, for up to 2 days.