1. Add the bacon to a cold skillet, then turn the heat to medium. Cook for 5–7 min per side, or until crispy. Transfer to a paper towel-lined plate to drain.
2. Toast the sourdough until lightly golden. Spread mayonnaise on one or both slices.
3. Layer on the tomato, bacon, and avocado. Sprinkle the avocado with salt and pepper, then add the lettuce. Top with the second slice of bread, slice in half, and enjoy!
