Sourdough Starter Discard Cinnamon Raisin Bread

• 6 oz water
• 1 oz sugar
• 1 packet/envelope active dry yeast
  o bien 2 ¼ tsp active dry yeast
• 16 oz all-purpose flour
• 4 ½ oz sourdough starter discard (unfed)
• 1 large egg
• 2 ½ oz unsalted butter diced, room temperature, plus extra to grease
• ½ tsp salt to taste

Filling

• 3 oz sugar
• 2 tsp all-purpose flour plus extra to dust
• 1 tbsp ground cinnamon
• 1 large egg whisked
• 4 oz raisins
• unsalted butter melted, to brush (opcional)
• confectioners sugar to sprinkle (opcional)