Combine softened cream cheese, sour cream, lemon zest, lemon juice, dill weed, chives, garlic, grated cucumber and bacon bits in a medium mixing bowl. Stir everything together until the ingredients are evenly combined.
Using a 5-inch cookie cutter, cut two rounds from each slice of bread. Spread an ample amount of the cream cheese mixture on one side of a bread round. Top with another bread round.
You can serve the cucumber tea sandwiches as is. But it you wanted to jazz them up a bit, pipe a small dot of the filling on the top of each sandwich. Place one cucumber slice over the top.
Pipe an additional dot of filling on the top of each cucumber slice. Top each sandwich with a small frond of dill weed and a sprinkling of chopped bacon bits.