Ham Calzone

Ingredients

• 450 g / 1 lb mushrooms, quartered
• 45 ml / 3 tbsp olive oil
• 600 g / 1 lb 5 oz pizza dough, in 4 equal pieces
• 125 ml / 1/2 cup tapenade
• 350g / 12 oz cooked ham, in strips
• 400 ml / 1 2/3 cups / 200g grated Friulano cheese
• 20 basil leaves
• 2 egg yolks, lightly beaten