1Combine the bread flour, salt and yeast in the bowl of a stand mixer. Add the water. Using the dough hook, knead on low speed for 5-6 minutes until the dough is smooth and elastic.
2Cover the bowl with plastic wrap and let the dough proof in a warm place for 1 hour, until doubled in size.
3Turn the dough onto a lightly floured countertop and divide evenly into four pieces. Shape each piece into a smooth ball.
4Lightly sprinkle two baking sheets with the semolina mix and place the dough balls 4-inch apart on the sheets. Drizzle a little oil over each ball and spread to coat the dough. Cover with plastic wrap and refrigerate for at least 6 hours or up to 5 days (refrigerating the dough for 1-3 days is ideal but it can be refrigerated for up to 5 days).
5When ready to prepare the pizzas, remove the dough from the refrigerator and stand, covered, at room temperature for 1 hour.
6Sprinkle clean countertop generously with the semolina mix.
7Transfer one dough ball to the prepared countertop. Keep the remaining dough covered to prevent it from drying out.
8Coat the dough ball in the semolina mix and working from the center, press it into a 6-inch round, leaving a ¾-inch border, then gently stretch it into a 9-inch-11-inch circle.
NOTE: To make the semolina mix, combine equal quantities of semolina and all-purpose flour. Store in an airtight container in the pantry.