Prepare all the ingredients for the filling as noted (mince, grate, chop) and set aside.
In a blender, add roughly chopped apple and pecans and 2 Tablespoons water. Blend until creamy. Set aside.
Make the moo shu pancake dough. Sift the cassava flour into a large bowl. Add boiling water to the flour ⅓ cup at a time, stirring with a wooden spoon until dough starts to form.
Once your dough starts coming together, knead the warm dough with your hands until it holds a ball shape and isn’t too sticky.
Divide the dough into 16 equal balls. (See tip in section above for easy measuring.)
Using a tortilla press, press each ball, one at a time, between 2 pieces of parchment paper.
Once all pancakes are pressed, heat a skillet over medium heat. Add ½ Tablespoon of sesame oil to the pan. Add 3 to 4 pancakes. You can go faster by using 2 skillets at the same time. Cook each side about 90 seconds to 2 minutes or until lightly golden. Repeat this adding sesame oil to the pan for each batch.Note: If you use a rolling pin and have thicker pancakes, you may need more time on each side. When all pancakes are finished, set aside covered with a damp cloth.
Now, start work on the filling. Heat the olive oil in large skillet over medium high heat. Add garlic, ginger, and scallion. Stir fry until aromatic. About 1 minute.
Add the broccoli, radishes, carrots, and cabbage. Cook until tender, about 3 to 5 minutes.
Stir in the apple and pecan mixture and 2 Tablespoons sesame oil. Stir to combine. About 1 minute. Remove from heat.
You can optionally reheat the pancakes in the oven or microwave (see tips in the section above.)
Serve the low histamine vegetable filling in a large bowl next to a stack of pancakes and let everyone build their own!