1. Start by gathering all your ingredients: bagels, avocado, eggs, cheese, and any preferred toppings or seasonings.
2. Prepare your avocado by slicing, mashing, or making chunky guacamole, depending on your texture preference.
3. Slice the bagels in half and prepare any additional toppings such as tomato slices, spinach, or red onion.
4. Toast the bagel halves to your desired crispness, either in a toaster or on a skillet. Optionally, lightly butter or oil the cut sides before toasting for a golden finish.
5. Heat a non-stick skillet and add a small amount of butter or oil. Fry the egg to your liking (sunny-side up, over easy, or fully cooked).
6. If using cheese, place a slice on top of the egg during the final cooking moments to let it melt slightly.
7. Spread the avocado on one or both toasted bagel halves. Choose a smooth or chunky spread based on your preference.
8. Layer your selected toppings such as spinach, tomatoes, or bacon on top of the avocado spread.
9. Place the fried egg with melted cheese onto one of the bagel halves.
10. Close the sandwich with the other bagel half, pressing gently to secure the layers.
11. Add optional seasonings or spreads like everything bagel seasoning, herb mayonnaise, or Sriracha mayo for extra flavor.
12. Serve the sandwich immediately to enjoy its fresh and warm flavors.
13. If prepping in advance, store components separately in airtight containers and assemble the sandwich just before serving for maximum freshness.