In a small bowl, dissolve the sugar in the warm water. Sprinkle the yeast over the top and let it sit for about 5-10 minutes, or until frothy.
In a large bowl, combine the all-purpose flour, whole wheat flour, and salt.
Make a well in the center and pour in the yeast mixture and vegetable oil.
Stir until a dough begins to form, then turn out onto a floured surface and knead for about 8-10 minutes, until smooth and elastic.
Place the dough in a lightly oiled bowl, turning it once to coat all sides with oil.
Cover with a damp cloth or plastic wrap and let it rise in a warm place for 1-1.5 hours, or until doubled in size.
Punch down the dough to release the air. Turn it out onto a floured surface and shape it into a loaf or divide it into smaller rolls.
Place the shaped dough onto a baking sheet lined with parchment paper.
Cover the dough with a damp cloth or plastic wrap and let it rise for another 30-45 minutes, or until puffy.
Preheat your oven to 375째F (190째C).
If desired, brush the top of the dough with a beaten egg and sprinkle with sesame seeds.
Bake in the preheated oven for 25-30 minutes, or until the bread is golden brown and sounds hollow when tapped on the bottom.
Allow the bread to cool on a wire rack before slicing.
Enjoy your Tapalapa bread!
Enjoy your meal!