1Line 2-cup bowl or mold with plastic wrap. Beat cream cheese in medium bowl with electric mixer on medium speed until smooth. Stir in salmon, 2 tablespoons of the red onion, 1 tablespoon of the dill weed and the mustard. Spoon into bowl lined with plastic wrap, pressing firmly. Cover and refrigerate at least 2 hours but no longer than 24 hours.
2Turn upside down onto serving plate; remove bowl and plastic wrap. Garnish pâté with remaining 1 tablespoon red onion, 1 tablespoon dill weed and the capers. Serve with crackers.