Add 1 teaspoon butter to a medium skillet and heat over medium heat. Cook egg according to your preference. We love over medium eggs, so we would cook the egg about 3-5 minutes, or until whites are cooked, then flip it and cook 1-2 more minutes. Remove the egg immediately from the heat.
While your egg is cooking, toast your sourdough toast to desired doneness. Place remaining 1 teaspoon butter over toast.
Add the mashed avocado to the toast, then the bruschetta, arugula and ending with the egg. Sprinkle with salt and pepper.
Eat immediately and enjoy!