In the bowl of a stand mixer, add the water, yeast, and honey. Mix and let it sit for 5 minutes.
After 5 minutes, add the flour, salt, sourdough discard, and 2 tablespoons of olive oil. Mix in the stand mixer with the hook attachment for 5 minutes. The dough will be very sticky, but that is what you want.
Cover the bowl with plastic wrap and let it sit for 1 hour.
Add 2 tablespoon of olive oil to a pan. You can use a cast iron skillet, a 9x13 inch baking dish, or two 8x8 inch baking dishes.
Turn the dough into the prepared baking dish. Stretch the dough out so it fits the baking dish. Let it rise for another 45 minutes.
Preheat the oven to 400 degrees F. While the oven preheats, wet your hands. Dimple the focaccia with your fingers all over the dough. Add the remaining olive oil to the top of the focaccia and sprinkle with sea salt and any other toppings you would like.
Bake for 35-40 minutes or until the focaccia is golden brown and baked through.