Pour water into mixing bowl of electric mixer. Cover with yeast and about ½ tsp. of the sugar. Stir gently to hydrate the yeast. Let it sit for 5-10 minutes to get foamy. (If using instant yeast, skip this step and mix your yeast and water in with everything else in the next step.)

Add the yolks, oil, honey, sugar, and flour. With the dough hook attachment, knead the mixture for about 4-5 minutes.

With the mixer on low, slowly add the salt. Knead for an additional 2-3 minutes until the salt is fully absorbed and the dough passes the windowpane test.

Place dough in an ungreased bowl, cover with plastic wrap, and let rise in a warm area for about 3 hours.

In the meantime, make the blueberry filling. Pour the berries into a small or medium size saucepan. Pour the sugar, cornstarch (or Clear Jel), cinnamon, cloves and salt over the blueberries. Over medium heat, stir the mixture and cook until the juices on the bottom start to simmer. Reduce the heat to medium-low and continue stirring just until the mixture thickens. Remove from heat (pour into a heat proof bowl to stop it from cooking further in the pot) and allow to cool to room temperature before using. (You can make the filling in advance and work with it directly from the refrigerator. Just give it a good stir before you spread it on the dough.)

Gently deflate the dough by pulling a piece from the bottom and folding it over itself, turning the bowl so you can do four similar folds.

Weigh the dough and divide into equal portions. If making two loaves, divide into six equal portions. If making one large loaf, divide into three equal portions.

Roll out each portion into a rectangle (like you do for a cinnamon roll or a babka). Any dimensions will work, but make sure you use the same dimensions on all three strands of each loaf. (For example, I made two loaves -- which meant six strands -- and rolled each strand to approximately 11 inches long by 5 inches wide.) Portion out the blueberry filling to the number of total strands you will have. It is best to weigh the amount of filling and divide it by the number of strands. (For example, I had approximately 144 grams of filling. I therefore spread approximately 24 grams on each rectangle.) The filling should be spread thin (less is more here). On each rectangle, you can spread the filling to the edge of one of the long sides, but be sure to leave ½ an inch border on the other three sides. Starting from the long side with filling that reaches the edge, roll up each rectangle like you are rolling up a cinnamon roll. Firmly pinch the long edge and the sides so that each roll is fully enclosed. You can gently roll it against the counter to even it out and lengthen each strand slightly.

Towards the end of the rising time, preheat oven to 350° F.

Apply egg wash. Bake 30-40 minutes until golden brown on top and sides. Err on the side of over-baking a few minutes, as you do not want to risk the middle being unbaked.