Line a strainer with cheesecloth and set over a bowl. Place cottage cheese in strainer, cover, and chill at least 8 hours or up to 1 day. Discard liquid.
Finely dice about a third of the salmon; coarsely chop remainder. In a blender or food processor, whirl drained cottage cheese, coarsely chopped salmon, wine, lemon juice, and mustard until smooth. Stir in diced salmon, dill, and salt and pepper to taste.
Spoon mixture into a bowl, cover, and chill at least 4 hours or up to 2 days.