These bagels are somewhere in the middle, but definitely more on the side of no big blueberry pieces. If you don't want any blueberry chunks at all, take an immersion blender to the roasted blueberry water before adding it to the bagel dough. If you do want blueberry chunks in your bagels, roast the blueberries for less time — no more than 5 minutes — and don't stir them in the water. You could also soak 1/4 cup store bought dried blueberries in the roasted blueberry water for about 10 minutes before adding it to the dough.