Macadamia brioche buns - Australian Macadamias

Ingredients

• 17 g dried yeast
• 1/3 cup water (lukewarm)
• 200 g plain flour
• 1/4 tsp salt
• 1 egg
• 40 g butter (softened to room temperature)
• 1 egg (extra, lightly beaten)
• 1 tsp cinnamon
• 1 tbsp raw caster sugar
• 1/2 cup macadamias (finely chopped)
• 2 tbsp butter (melted)