Dough

• 

  extra virgin olive oil plus extra to grease

  30 g
• 

  lukewarm water

  220 g
• 

  sugar or malt powder (optional)

  1 tsp
• 

  dried instant yeast

  2 tsp
• 

  baker's flour plus extra to dust

  400 g
• 

  salt

  1 tsp
• 

  milk chocolate broken into pieces

  180 g
• 

  plain sweet biscuits crushed

  2 - 3
• 

  marshmallows to decorate