In a small bowl, combine yeast and sugar. Add ½ cup warm water. Let sit for 5 to 10 minutes until foamy.

In a large mixing bowl or in the bowl of a stand mixer, Add bread flour, whole wheat flour and salt. Pour in yeast mixture and another ½ cup warm water. Stir, adding just enough of remaining ¼ cup water until dough forms.

Transfer dough to lightly floured surface. Knead dough by hand 10 to 15 minutes until smooth, firm and elastic; OR, knead dough in a stand mixer with the dough hook attachment on medium speed for 5 minutes until dough is smooth, firm and elastic. Reduce speed to low and knead in ½ cup muesli and chocolate chips just until incorporated.

Shape dough into a ball and place in a large, lightly greased bowl; turn to coat. Cover with plastic wrap or tea towel and let rise in a warm place for 1 hour until doubled.

Preheat the oven to 425 degrees F, and line a baking sheet with parchment paper. Fill a large, wide pot two-thirds full with water. Heat water to a boil and then reduce to a simmer.

Punch down dough and divide into 8 equal pieces. Shape each piece into a smooth ball. Use fingers to poke a hole in the center of each ball, stretching each hole until it is as big as half the diameter of the entire bagel (it might look too big at first, but it will shrink when you boil/bake it). Place bagels on the prepared baking sheet. Cover with a damp towel or lightly greased plastic wrap and let rest for 10 minutes.

Once bagels have rested, use a slotted spoon to lower a few bagels at a time into simmering water. Allow bagels to float to top. Leave the bagels in water for 1 to 2 minutes, then flip over and leave in water another 1 to 2 minutes (the longer they stay in the water, the chewier they become).

Remove bagels with a slotted spoon and return to the prepared baking sheet. Repeat with remaining bagels.

Brush tops of bagels with egg wash, then sprinkle remaining ½ cup muesli over top. Bake for 15 to 20 minutes until the bagels are golden brown. Remove from the oven; transfer to a cooling rack to cool completely before slicing.