Updated December 28, 2014. These sandwiches are very unique and often receive a lot of attention at parties. The ingredients that are combined together, create the perfect bite of flavors. Our boys are huge fans of those sandwiches, they often ask to add more fish to theirs. Smoked canned sprats are common in European countries. They can be found in many European markets. If you don't have access to them, you can replace them with any other canned fish.