In a greased 13x9-in. baking dish, unroll crescent dough into a long rectangle; seal seams and perforations. Bake at 375° until golden brown, 10-12 minutes. Cool completely on a wire rack.
In a small bowl, beat the cream cheese, sour cream, dill and salt until smooth. Spread over crust. Top with the seafood sauce, green pepper, onion, cheese and shrimp. Cover and refrigerate for 1 hour. Cut into squares.