Mix together warm water, inulin and yeast in a small bowl and cover with cling film and a towel or silicone mat to keep warm. Transfer to a nice warm spot until yeast activates and is foamy (15-20 mins). See Note 1.
Add butter, herbs and garlic to a food processor and chop until creamy and smooth. Transfer to a small bowl and set aside. See Note 2.
Heat cheese and cream cheese in microwave-safe bowl for 2 minutes on high. Stir to combine.
Add eggs and baking powder. Stir to combine (mixture should foam up a lot). See Note 3.
Add remaining ingredients and mix until well combined and until no longer sticky. See Note 4.
Transfer dough to a silicone mat and chop into 4 even pieces.
Roll one piece of dough thinly (approx into a 25cm diameter circle between 2 pieces of baking paper. (watch the video for tips). Transfer to the prepared baking tray. Spread very thinly with some herb & garlic butter. See Note 5.
Repeat with all pieces of the dough and stack one on top of each other pushing each layer to match the edges of the one below it. Spread with garlic butter before adding the next layer. Do not butter the top layer. See Note 6.
Once they are all stacked run a silicone cake scraper around the edge to make a perfect round. (Alternatively use a spatula or similar). See video to see how easy this is. See Note 7.
Place a bowl or cup (approx 10 cm in diameter) upside down into the centre of the dough and mark an indentation.
Using a pizza wheel cut from the indentation line (not all the way into the centre) to the edge of the dough. Cut into 16 equal segments. See Note 8.
Using two hands pick up two strips of the dough and twist away from each other then press the ends of the strips together to make the star points. Repeat with all strips to create the Star Bread shape. See Note 9.
Season with nigella seeds and salt flakes (if using). Cover with silicone lat and place into a warm spot and allow to rise for 1 hour.
Preheat oven to 180℃ fan/200°C static/400°F. Line a large baking tray with baking paper.
Bake for 20-30 minutes or until golden and cooked through. See Note 10.