Poppy seed and lemon zest sourdough bread

Ingredients

• 350 g of bread flour (Bob's Red Mill)
• 280 g of water
• 70 g of an active sourdough starter (100% hydration)
• 7 g of salt
• 8 g of sugar
• 10 g of butter
• grated zest from 1 lemon
• 1 handful of dry poppy seeds