Fill a small pot with water and bring to a boil. Place the sweet potato inside and boil for about 30 - 45 minutes, until the potato can be easily poked with a fork. In another small pot, place an egg inside and fill with water, just enough to cover the egg. Bring to a boil, remove from heat, and let sit for 10 minutes. Slice the egg into quarters. Mash 1/2 of an avocado and mix with olive oil, sea salt, and cayenne pepper. Mash the sweet potato and smear on the cracker. Then top with mashed avocado, and top with an egg.