In a large bowl, combine the discard, olive oil and water.
Next, add the dry ingredients, flour, yeast and salt. Mix until all the dry ingredients are fully incorporated. The dough will be sticky.
Cover the dough and let it rest for about 30 minutes.
Time to stretch and fold! Gently lift a section of the dough and stretch as far as you can without ripping, turn the bowl and repeat all the way around.
Next, flip over the dough with the seam facing up, create a smooth dough ball while creating some tension without ripping the dough. Cover and rest for 30 minutes.
Do another round of stretch and folds, cover and let rest until it doubles in size, about 45 minutes to an hour.
Once the dough has doubled in size, line your baking sheet with parchment and pour 2 TBSP of olive oil into the pan. Spread evenly on the pan.
Release the dough from the bowl and place it on the pan. Flatten the dough slightly, forming it into a loaf shape and tuck in the ends.
Cover the dough and let it rise until the dough takes up the baking dish. about 1 hour.
Once the dough has filled the pan, preheat your oven to 425℉.
Drizzle the olive oil on top of the dough, dimple the dough gently and make sure not to do to much or you will deflate the bubbles.
Sprinkle your desired toppings on the focaccia
Bake the focaccia at 425℉ for 18 to 23 minutes, or until golden brown.
Let your focaccia cool and then enjoy!