In a bowl, mix warm water, sugar, and yeast. Let it sit for 5–10 minutes until foamy.
In a large bowl, combine bread flour and salt.
Add the yeast mixture and mix into a stiff dough.
Knead for 10–12 minutes until smooth and elastic.
Cover and let the dough rest for 1–1.5 hours until slightly risen.
Divide dough into equal portions and shape into rings.
Boil each bagel for 30–60 seconds per side, then bake at 200–220°C until golden brown.