Preheat oven 400 degrees. Spray 3-5 silicone burger molds 3 molds makes thicker buns 5 molds makes thin buns) with cooking spray or use foil burger rings.
In a large mixing bowl sift or whisk together all the dry ingredients except the sesame seed until there are no lumps in the dry ingredients
Stir the eggs into the dry ingredients until all the dry ingredients have been moistened
Stir the oil in until fully combined. Add the water and stir for at lest 20 seconds or until a smooth moist dough forms
Form dough into a ball and massage the dough to make sure of the texture. Dough should be slightly moist and smooth
Divide dough evenly among the prepared molds. Roll each portion into a smooth ball and flatten evenly throughout each mold. Make sure the buns are smooth
In a small bowl whisk together 1 egg and 1 TBS water until they are fully combined. Lightly brush the egg wash over the top of each of the buns
Sprinkle the top of each bun with desired amount of sesame seeds. Place in preheated oven and bake at 400 degrees for 20 minutes
Remove from the oven. Allow to cool in the molds about 15 minutes. Transfer to a wire rack and allow to cool completely before slicing
When ready to use slice the buns horizontally through the center to create a top and bottom bun, Store leftovers in an airtight container at room temperature up to 3 days or in the freezer up to 3 months