Add to your Bosch machine with paddle attachments, the sourdough levain, saf instant yeast, granulated sugar, olive oil, sea salt, egg, and filtered water. Mix well until well combined.
In a medium bowl, mix flour blend, psyllium husk powder, and xanthan gum
Take off paddle attachments, and switch for the kneading hook. Add half the flour mixture. Turn on Bosch to start incorporating the flour. Add the other half of the flour and keep it on speed one until it is all incorporated. You make need to stop once or twice to scrape down the sides. With the lid on, turn up the speed to level 2 for 1 minute. Remove hook. Let dough rest 10 minutes.
Meanwhile, in a large skillet, fill it with filtered water(yes you read that right- this is important to use filtered water even when boiling to get the right texture). Add baking soda. Turn on the heat on low-medium. You want the water to be ready when you are, so I like to just have it on a low simmer, then turn it up to a boil right before I am ready to put the bagels in.
Turn on oven to 200 degrees, then turn it off. This will be where you proof your bagels. It is also important to cut parchment paper into 12 squares for placing on the baking sheet.
After the 10 minutes is up, dump the dough out onto a floured parchment paper. Sprinkle some flour on top. Gently coat the dough-you're not really kneading the dough so much and just making sure the outside isn't too sticky.
Using a metal scraper, divide the dough into 12 equal portions. Make sure your hands are well floured. Shape each section into a circle, then place this on the parchment paper, stick your finger in the center, and gently swirl the dough around your finger to make the center hole. The center of the dough will be sticky, so keep your hands well floured.
Place bagel on a parchment square and then set on the baking sheet. Repeat until all 12 bagels are on the baking sheet.
Cover with a damp tea-towel and place in warm oven(make sure it is OFF) for 7-10 minutes. It is very important that the bagels do not over proof. I often take it out at 7 minutes for my oven. While they are proofing, make sure your water is boiling.
Make the egg wash by mixing 1 egg with 1 tsp of filtered water. Set aside. Gather any toppings you will need.
After the proofing is done, take the bagels out of the oven and turn the oven back on to 400 degrees.
Take all the bagels off the baking sheet and place one sheet of parment paper on the baking sheet. Carefully place bagels into the boiling water(if you used the parchment square to lower it into the water, they will just slide off). Boil about 20 seconds on each side and place back on the baking sheet with parchment paper.
I can boil 4 bagels at a time in my large skillet. Once the bagels have been boiled and cool a minute or two, I put the egg wash and toppings on one side, then flip it over and do the egg wash and toppings on the other side.
When all the bagels are ready and the oven is up to temperature, bake them at 400 degrees for about 45 minutes. Use a baking thermometer to make sure they are at least 205 degrees internal temperature. You don't want to do all this work and not bake them long enough.
Once baked, remove to a cooling rack. Let cool COMPLETELY! These bagels are so good they don't even need to be toasted the first day! Amazing!
These bagels are best the first day. They will start to sweat; so if you aren't eating them all the first day, you won't want to store them in a totally sealed container. Make sure they can breathe. If they do sweat too much, that's okay, just toast them and they are still good for 1-2 days after baking