In a large mixing bowl add the bread flour, salt, sugar and yeast
Pour the warm water and vinegar into the bowl and mix
Knead the dough for 10 minutes then let it stand for 10 mins
Cover the bowl and leave it in the fridge overnight
Wake up early and take the dough out of the fridge a couple of hours before you want to use it
Sprinkle some flour onto your surface, punch down the dough and knead it before splitting into 6 (ish) balls. I like to weigh them out to ensure they're around 120g
Pre heat your oven to 220C and cover your baking trays with baking paper
Fill a large pan with boiling water and add the sugar in. Once it's simmering you're ready to go
Use your thumb to form a hole in the middle of the first ball of dough. Shape into a bagel and lower it gently into the water. Repeat with each ball of dough
Boil for 30 seconds and then carefully turn the bagel over and leave it for another 30 seconds. Carefully remove each bagel and place onto the baking tray and cover with poppy and/or seame seeds
Pop them in the oven for 20 minutes
Enjoy fresh hot bagels for breakfast