Remove the cold smoked salmon from the package and set it aside. Slice the avocado in half, remove the pit, and scoop the flesh into a bowl. Mash the avocado with a fork until smooth. Set aside.
Crack the egg into a bowl, add milk or cream, and season with salt and pepper. Whisk until well combined. Heat a non-stick skillet over medium heat and add the egg mixture. Cook, stirring occasionally, until the egg is scrambled to your desired consistency. Remove from heat and set aside.
Toast the slice of sourdough bread until golden brown and crispy.
Spread the mashed avocado onto the toasted bread.
Place the scrambled egg on top of the mashed avocado layer.
Place 3-4 pieces of ButcherBox Cold Smoked Salmon on top of the scrambled egg.
If desired, garnish the avocado toast with fresh chives or dill.