Place the salmon on a chopping board and cut into shreds, then turn the shreds and chop them into dice. Add the red onion and fresh dill and continue to chop until the ingredients are finely minced and evenly distributed. Add the olive oil, mix it in and set the salmon aside. In a small bowl, combine the mayonnaise, lemon peel and lemon juice. Serve the chopped salmon on top of slices of cucumber or zucchini. Garnish with tiny dollops of lemon-mayonnaise.