Toast the bread in a toaster until golden and crispy, place the quarter avocado over the toast, slice it and mash it on top of the toast. Top with eggs of choice, and season with salt and pepper, to taste.
Bring a large pot of water to a boil. Crack one egg into a small bowl. Stir vinegar into the water and create a vortex with the boiling water. Lower the heat so the water creates a rolling boil at the bottom of the pot. Then, carefully add the egg to the middle of the pot and cook for 3-4 minutes, according to desired doneness. Remove the egg with a slotted spoon.