Cut an avocado in half and remove the pit. Slice the avocado in 1/2-inch thick slices and use a round cookie cutter or knife to cut an even circle in the center. Rub a skillet with a light coating of oil and place the avocado slices on top. Crack an egg in the center of each avocado. Turn the skillet up to medium heat and place a lid over the skillet and allow it to cook for two to three minutes. Remove with a spatula, sprinkle with salt and pepper and serve.