Make a creamy and elegant salmon mousse using a food processor. Start by blending cooked salmon fillets, cream cheese, lemon juice, dill, and salt in the food processor until smooth. In a separate bowl, whip heavy cream until stiff peaks form. Gently fold the whipped cream into the salmon mixture. Transfer the mousse to serving dishes or a mold and refrigerate until set. Serve the salmon mousse with crackers or toasted bread for a sophisticated appetizer.