Ultimate Fugazzeta: My Argentinian Onion & Cheese Dream

Ingredients

• All-Purpose Flour: 500g (approximately 4 cups)
• Instant Dry Yeast: 7g (approximately 2 1/4 teaspoons)
• Granulated Sugar: 1 tablespoon (15 ml)
• Salt: 1 teaspoon (5 ml)
• Warm Water: 300ml (approximately 1 1/4 cups), lukewarm (around 110°F/43°C)
• Olive Oil: 4 tablespoons (60 ml), plus extra for greasing
• Large Yellow Onions: 4 (approximately 1 kg), thinly sliced
• Olive Oil: 4 tablespoons (60 ml)
• Black Pepper: 1/2 teaspoon (2.5 ml)
• Dried Oregano: 1 teaspoon (5 ml)
• Whole Milk Mozzarella Cheese: 500g (approximately 1.1 lbs), shredded
• (Optional) Provolone Cheese: 100g (approximately 3.5 oz), shredded