Mash the avocado in a small bowl and season with salt and pepper.
For Sunny Side Up Egg Option:
Heat a small nonstick skillet over low heat, when hot spray with oil and gently crack the egg into the skillet. Cover and cook until the egg sets and the yolk is to your liking.
Beat the egg in a small bowl with a fork and season with a pinch of salt. Heat a small nonstick skillet over low heat, when hot spray with oil and pour the egg into the skillet. When the edges start to set, gently fold the eggs until the eggs are cooked through, about 2-3 minutes.
Poached Egg Option:
Bring a small pot of water to a boil. Crack the egg into a small bowl. When the water is boiling stir 1 teaspoon of white vinegar into the water and stir in a circular motion to create a vortex. Lower the heat then carefully add the egg to the middle of the pot and cook for 3-4 minutes, until the yolk is cooked to your liking. Remove the egg with a slotted spoon and place on a paper towel.
To finish the avocado toast:
Place mashed avocado over toast, top with egg, sprinkle with salt and pepper and/or hot sauce or red pepper flakes, if desired!