In a large bowl, combine the water, yeast and sugar. If you're using active dry yeast, let this sit for 5-10 minutes to become foamy. Then add in the flour and salt. Mix it with a fork to create a shaggy dough. Then, switch to using your hands to combine it. Place it on a clean work surface and knead for around 8 minutes until strong and smooth. This can also be done in a stand mixer with a dough hook.
Let the dough rise until doubled in size. After rising, punch down the dough, remove it from the bowl, and weigh it. Cut it into 8 equal-sized pieces and shape into balls. Let these rest for about 5 minutes to relax the gluten. To shape the bagels, press your thumbs and index fingers into the dough ball to create a hole, then gently widen the hole by rolling the dough around your fingers.
Let the bagels have a short second rise at room temperature until slightly puffy. The bagels should look a bit puffed but not doubled in size. I place them on individual pieces of parchment paper so it’s easy to transfer them into their poaching bath.
Bring a pot of water to the boil and stir in the brown sugar.
Preheat the oven to 425°F/220°C. Line a baking pan with a silicone mat or parchment paper.
Drop the bagels on their parchment paper squares in the boiling water, in batches one at a time. Remove the paper once the bagels are in the water.
Let them poach in the water for 1 minute, flipping them after 30 seconds. Remove the bagels from the water using a slotted spoon and place them on the baking sheet.
Brush them with egg wash and generously sprinkle with sesame seeds.
Bake the bagels for around 20-25 minutes until deeply browned. Let them cool down before serving and slicing.