This is a quick and tasty appetizer to serve at a wedding reception.
In a small bowl, combine cream cheese and chopped chives until smooth. Transfer cream-cheese mixture to a pastry bag fitted with an Ateco#863 star tip.
Using a 1 3/4-inch round cookie cutter, cut 2 rounds from each bread slice. Pipe mixture onto each; garnish with caviar and chives. Serve immediately.