Prep the avocado: Cut the avocado, remove the pit, and scoop into a bowl. Mash lightly with a fork. Add a pinch of salt, pepper, and a small squeeze of lemon to keep it bright and fresh.
Set aside.
Cook the turkey bacon: Heat a nonstick skillet over medium. Lay in the turkey bacon and cook until crisp at the edges, about 4–6 minutes, flipping once. Transfer to a plate lined with a paper towel.
Toast the bread: Split your English muffins or buns.
Lightly butter the cut sides and toast in the same skillet until golden. You can also use a toaster, but pan-toasting adds flavor.
Cook the eggs: Add a dab of butter or oil to the skillet. Crack in the eggs and cook to your preference—over-easy, over-medium, or scrambled.
Season with salt and pepper. If using cheese, add a slice to each egg during the last 30 seconds so it melts.
Assemble: Spread a thin layer of mayo or mustard on the bottom half of each bun. Spoon the mashed avocado over the sauce.
Add greens if using. Top with turkey bacon, then the egg and cheese. Finish with the top bun.
Serve: Press gently to hold everything together.
Eat right away while it’s warm and melty. Add hot sauce if you like a kick.