Unroll crescent roll dough and place on an ungreased 12-inch pizza pan. Flatten dough, sealing seams and perforations. Bake at 350 degrees F for 8-10 minutes or until lightly browned; cool.
In a small mixing bowl, beat cream cheese until smooth. Stir in 1 cup spinach, onion, dill, 1/2 teaspoon lemon peel, lemon juice and pepper. Spread over the crust. Top with crab, olives and remaining spinach and lemon peel. Cut into bite-size squares.