Toast 3-4 large slices of sourdough bread. Using a measuring cup or measuring spoon that is approximately 1.5 inches in diameter, cut out small bread rounds from the toasted sourdough. You should end up with 18 small bread rounds.

Slice the cherry tomatoes crosswise and tear the butter lettuce into smaller pieces. Slice the avocado into small wedges.

Cut each bacon slice into 6 pieces, fry the bacon in a frying pan over medium-high heat.

To assemble the sandwiches, spread a small amount of mayonnaise onto 2 bread rounds. Then add the following to the sandwich: 1-2 wedges of avocado, 2 pieces of bacon, 1 tomato slice, and 2-3 pieces of butter lettuce. Top the sandwich with the other bread round.

Insert a toothpick through each sandwich. Serve immediately.