Muffaletta Squares

Name: Muffaletta Squares
Prep time: 30 min
Cook time: 2 h 20 min
Total time: 2 h 20 min
Yield: 24 pieces
Ingredients: 600 g strong white bread flour; 3 tsp dried instant yeast; 380 g water; 20 g olive oil; 1 pinch caster sugar; 1 tsp fine sea salt; coarse salt; 1 garlic clove; 1 stick celery; 30 g shallots; 50 g pitted black olives; 100 g green olives; 2 roasted red peppers, preserved; 80 g extra virgin olive oil; 1 Tbsp pickled capers; 1 Tbsp red wine vinegar; 150 g salami; 130 g mortadella; 10 slices Emmental cheese; 250 g fresh mozzarella