Grease your baking dish/dishes and then add a tablespoon or so of olive oil into the bottom of each baking dish
Remove the dough from your refrigerator and use a silicone spatula or fork to pull the dough from the sides of the bowl
Divide the dough if baking in multiple dishes and transfer the dough into the prepared dishes
Flip the dough over several times to coat it in the olive oil and let the dough rest at room temperature until fully doubled in volume (this will take between 2-4 hours)
Place a large skillet over medium heat and cook 16 ounces of Italian sausage until browned and broken into small pieces. Set aside to cool.
Preheat your oven to 425 degrees
When the dough is fully rested, drizzle the top of the dough with olive oil and crumble the browned Italian sausage evenly over the top
Use your fingers to spread the dough out, gently press the sausage into the dough and leave dimples all over the dough (see photos above)
Sprinkle the top of the dough with flaky sea salt
Bake in a 425 degree oven for 25-35 minutes depending on the size of baking dish you are using (smaller dishes will be ready quicker than the larger one)
Once the bottom of the focaccia is golden brown and crispy, transfer the baking dish onto a cooling rack for 5 minutes and then transfer the focaccia directly onto a cooling rack to cool fully before slicing