01 - Combine warm water, sugar, and yeast in a large bowl. Let sit for 5 minutes until mixture becomes foamy and fragrant.
02 - Add olive oil, salt, and flour to the yeast mixture. Stir until a shaggy dough forms, then knead on a floured surface for 8 minutes until smooth and elastic.
03 - Place dough in an oiled bowl, cover with plastic wrap or a clean towel, and let rise in a warm place for 1 hour until doubled in size.
04 - Preheat oven to 375°F. Grease a 9-inch round or square baking dish with butter or cooking spray.
05 - Punch down dough and roll out to a 1/2-inch thick rectangle. Sprinkle evenly with olives, sun-dried tomatoes, feta, parsley, basil, garlic, oregano, and black pepper.
06 - Cut dough into 2-inch squares. Stack squares into small piles and arrange standing upright in the baking dish, fitting them closely together.
07 - Drizzle with olive oil and sprinkle with sesame seeds if desired.
08 - Bake for 30 minutes until golden brown and cooked through. The top should be crisp and the interior tender.
09 - Let cool in the dish for 10 minutes before serving warm. Pull apart individual squares to serve.