Slice the onion thin. Start by using about 1 tablespoon of butter to spread evenly over one side of both pieces of bread.
¼ large yellow onion, 2 tablespoons salted butter, 2 slices bread of choice
Add the remaining butter to a frying pan and allow it to melt over medium heat. Once melted, tilt the pan to coat the bottom in butter. Add the onions to the pan and fry over medium heat. Leave them for 5 full minutes without touching them. Then, add 2 tablespoons of water, and stir the onions. Continue to fry until the water cooks off. Then, set the onions aside and return the pan back to the heat.
Grab two small bowls or ramekins. In one, add ½ an avocado, a pinch of salt, and a pinch of pepper. Use a fork to smash the avocado and set aside. To the second bowl, add the mayonnaise and Sriracha and stir to combine.
½ large hass avocado, ½ teaspoon black pepper, 1 tablespoon mayonnaise, 1 teaspoon sriracha, ½ teaspoon salt
Flip the buttered bread so that they are buttered side down. To one slice, add the smashed avocado. To the other slice, add the spicy mayonnaise. Set the bread aside until you're ready to assemble your sandwiches.
To a mixing bowl, add the eggs, salt, and pepper. Use a fork or whisk to beat the eggs until the whites and the yolks are well-combined.
2 large eggs
Add the eggs to the center of the hot pan. If need be, slightly tilt the pan back and forth until the egg is in an even layer across the whole pan. Wait about 30 seconds until the edges start to cook, then use a spatula to push the eggs around the pan. As they become firm, start to fold the outer edges inward, bringing the scrambled eggs into the center of the pan and shaping them until they are roughly the same shape and size of your bread. Then, slide the eggs off the pan and set aside.
With the pan still over medium heat, place the slice of bread with the smashed avocado in the pan, buttered side down.
Place the cheese on top of the smashed avocado on the bread in the pan.
2 slices cheddar cheese
Then, add the scrambled egg on top of the cheese.
Next, layer the fried onions on top.
Finally, add the spicy-mayo bread on top, buttered side up. Fry like this for about 3-5 minutes until the bottom slice of bread is golden brown.
Then, flip your loaded breakfast sandwich to fry on the second side until both pieces of bread are toasted and golden brown and the cheese is melted.
Slice in half and serve. Enjoy hot.