Toast the sourdough slice until your preferred toast level!
Spread the mashed avocado evenly over the toast. Sprinkle lightly with salt.
Heat butter or oil in a small pan over medium heat. Crack in the egg and cook to your preference (fried, sunny-side up, or over-easy).
Spoon the chopped kimchi over the avocado layer.
Top with the cooked egg, serve and enjoy!