Preheat oven to 375 degrees.
Mix yogurt, flour and salt with a spatula or spoon, the mixture is kind of sticky. Kneed it a few times inside the bowl.
Add your blueberries, lightly mix with a spoon or spatula, you don't want mashed berries.
Take dough out on a board, flour lightly separate into 8 even balls.
For each ball, roll gently into a log about 7" long.
Then connect that log so it forms a circle with the hole in the center. The circle diameter is about 3".
Place all bagels on a parchment lined baking sheet. You should be able to fit 8 on a 9" x 13" baking pan.
Before baking brush tops and side of each bagel with egg wash.
Bake in a preheated 375 degree oven for about 18-20 minutes or until golden. If you find the tops are still not golden at the end of baking time place under broiler for a couple of minutes then remove