Step 1: Prepare the Dough

1. In a large mixing bowl, combine 450g (3 ½ cups) strong white bread flour, 1 tsp salt, 7g fast-action dried yeast, and 50g (¼ cup) caster sugar.
2. Mix 50g (¼ cup) melted butter, 250ml (1 cup) warm milk, and 1 beaten egg in a separate bowl.
3. Gradually add the wet ingredients to the dry mixture, stirring to form a soft dough.
4. Knead the dough by hand for about 10 minutes or use an electric mixer with a dough hook for 5-7 minutes until the dough is smooth and elastic.
5. Place the dough in a lightly oiled bowl, cover, and let it rise in a warm place for about 1 hour, or until it has doubled in size.

Step 2: Prepare the Coconut Filling

1. In a small bowl, mix together 100g (1 cup) desiccated coconut and 75g (⅓ cup) caster sugar.
2. Stir in 2 tbsp milk to form a moist, crumbly filling.

Step 3: Roll and Fill the Dough

1. Once the dough has risen, punch it down to release the air.
2. On a lightly floured surface, roll out the dough into a rectangle, about 30x40cm (12×16 inches) in size.
3. Spread the coconut filling evenly over the dough, leaving a small border around the edges.

Step 4: Shape the Buns

1. Starting from one of the long edges, roll the dough tightly into a log.
2. Cut the log into 12 equal pieces using a sharp knife.
3. Place the buns, cut side up, on a parchment-lined baking tray.

Step 5: Second Rise

1. Cover the buns with a damp cloth and let them rise for another 30-40 minutes, or until they have puffed up.

Step 6: Bake the Coconut Buns

1. Preheat your oven to 200°C (400°F).
2. Brush the tops of the buns with 2 tbsp milk for a golden finish.
3. Bake for 15-18 minutes, or until the buns are golden brown on top and cooked through.

Step 7: Cool and Serve

1. Once baked, remove the buns from the oven and allow them to cool slightly before serving.
2. Serve warm or at room temperature, and enjoy the delicious coconut-filled goodness!