Olive and Za'atar Focaccia

Name: Olive and Za'atar Focaccia
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: Mediterranean
Ingredients: 450 grams lukewarm water (, 2 cups); 5 grams active dry yeast (, 1 tsp); 10 grams honey (, 1/2 tbsp); 465 grams unbleached all purpose flour (, 3 3/4 cups + 2 tbsp , (I used King Arthur brand with 11.7% protein content) ); 10 grams kosher salt (, 2 1/2 tsp , (I used Diamond Crystal Kosher)); 80 grams olive oil (, 1/2 cup , divided); unsalted butter (, for buttering the pan); 1 cup pitted Castelvetrano olives; 1 tbsp za'atar; flakey sea salt