Note
1: Mix the mature sourdough starter, whole wheat flour, bread flour and warm water together by hand or with a fork and let sit at room temperature for 4 hours.
Once doubled in size, it will be ready for use.
2: Combine the bread flour, warm water, levain mix, diastatic malt powder, salt, yeast and sugar into a medium bowl or the bowl of the stand mixer and knead until it's smooth.
(If mixing by hand, this will take about 10 minutes and with the mixer, about 5 minutes on medium speed.)
3: Take the dough out of the bowl and cover it with a damp cloth or towel.
Let it rest at room temperature for about 30 minutes.
4: After the dough has rested, divide it into twelve 130-gram pieces using a digital scale for accuracy.
With the palms of both your hands, roll each ball into a long cylinder shape. Each piece should be about the length of your hands from pinky to pinky, with your thumbs touching.
5: Wrap the dough around your hand and press down on the seam.
Roll the dough back and forth a few times to seal the bagel.
6: Put the bagels onto a parchment-lined sheet pan to prevent sticking and wrap it tightly with plastic wrap.
Transfer the dough to the fridge for a 48-hour cold fermentation.
7: If using a home oven: An hour before you are ready to cook your bagels, preheat your home oven with the Ooni Pizza Steel inside, aiming for 260 °C.
If using wood or charcoal in a Karu 16: About twenty minutes before cooking, preheat the oven stone to 260 °C.
8: Remove the bagels from the fridge.
Bring a large pot full of water with the malt syrup to a boil until the water is frothy. Skim away some of the froth before adding your bagels, 3 at a time. Boil for 1 minute.
9: Carefully remove the bagels with a slotted spoon and place them on a serving board covered with parchment paper to prevent sticking.
Once cool to the touch, drop one bagel at a time into a bowl filled with everything bagel seasoning, making sure to get seeds over the entire bagel. Repeat this step with the other boiled bagels.
10: If using a home oven: Carefully launch the bagels and parchment paper onto the pizza steel, 4 at a time.
(Make sure the parchment paper stays to avoid the bagels sticking to the steel.) Bake for 15 minutes or until a light brown crust forms.
If using wood or charcoal in a Karu 16: Place 4 bagels on a strong baking tray lined with parchment paper.
11: Remove the bagels from the oven.
Slice, spread with butter or cream cheese and enjoy!
12: Repeat the steps with the remaining bagels.