Line a 2-loaf baguette pan with parchment paper.
Activate the yeast: In a small bowl, add the yeast and sugar to the warm water and give it a stir. When it doubles in size, 6 to 10 minutes, it is ready.
In a stand mixer fitted with the paddle attachment, beat the egg whites on medium speed for 4 minutes. You should have a nice white foam on top. You need the foam to make the bread airy. Add the cider vinegar and activated yeast and mix on low speed until just blended in.
Add the salt, pepper and flour blend. Mix on medium-low speed until blended together, about 2 minutes, scraping the sides of the bowl with a spatula halfway through.
Reduce the mixer speed to low and add the avocado oil; blend it into the dough.
Spoon the dough evenly into the prepared baguette pan. You can use a wet spatula to shape the bread, if needed, and to smooth out any rough edges.
Make several slits on the diagonal along the tops of the baguette dough.
Allow the dough to rise in a warm spot for about an hour.
Preheat the oven to 350°F (180°C).
Bake for 55 minutes, or until the breads have a beautiful, light golden brown crust.
Remove from the oven and allow to cool for 15 minutes before handling the bread and cutting it open.