In a large bowl, combine the white whole wheat flour, wheat flour, dry yeast, and finely chopped fresh rosemary whisking together to combine. Create a well in the flour mixture and add warm water (no more than 115° F) and oil.
Create a well in the center of the flour mixture. and add the warm water (no more than 115 F) and olive oil.
Stir vigorously until a sticky dough forms and all of the flour is incorporated.
Turn dough out onto a lightly floured surface.
Knead by stretching and folding the dough back on itself. Continue for about 5 minutes or 60 turns. The dough should become smoother and fully pull away from the surface. Alternatively: Process the dough in a stand mixer with a dough hook for 5-6 minutes.
Form the dough into a ball.
Oil a large bowl. Roll the dough so that it is covered in oil. Cover with a damp cloth or cling wrap.
Allow the dough to rise at room temperature until 2 ½ to 3 times its size, about 1 ½ to 2 hours depending on the room temperature. Preheat the oven to 425° F. Line a baking sheet with parchment paper.
Turn the risen dough out onto the parchment paper. Stretch with your fingers to a 9 inch by 14-inch rectangle. Cover with a damp cloth or cling wrap and allow to rest for 15-20 minutes. Uncover the dough. Using your finger push dimples into the dough about 2 inches apart.
Slice lemon into extremely thin rounds, less than ⅛th inch. A mandoline is the best tool for this task, but a very sharp knife also works.
Finely chop the fresh rosemary.
Top with thinly sliced lemon rounds sprinkle with finely chopped rosemary and kosher salt.