Place the center-cut bacon in a cold skillet and cook over medium heat until crispy, then transfer to a paper towel-lined plate to drain.
Toast the sprouted grain bread slices until golden brown and firm enough to support the toppings.
In a small bowl, combine the avocado, lemon juice, sea salt, and black pepper, mashing with a fork until mostly smooth but still slightly chunky.
Whisk the whole eggs and egg whites together in a bowl until well combined and slightly aerated.
Wipe the excess grease from the bacon skillet, leaving just a thin coating, and set over medium-low heat.
Pour the egg mixture into the skillet and cook, stirring gently with a spatula, until the eggs are soft, fluffy, and just set.
Spread the avocado mash evenly across the toasted bread slices.
Top the avocado with the soft-scrambled eggs and then layer the crispy bacon slices on top.
Finish with a sprinkle of red pepper flakes and serve immediately while warm.