Wash and dry the English cucumber.
Slice it crosswise into uniform ¼-inch (about 6mm) thick rounds. You should have at least 16 slices.
Arrange half of the cucumber slices on a serving platter.
Spread a thin layer of softened cream cheese onto each one.
Top each cream cheese-covered slice with a piece of sharp cheddar and a piece of crispy bacon.
Gently place the remaining cucumber slices on top to complete your mini sandwiches.
Serve immediately for the best crunch, or cover and refrigerate for up to 2 hours before serving.
Pat the cucumber slices with a paper towel before assembling to remove excess moisture and prevent the sandwiches from becoming soggy.