Preheat oven to 375 degrees. In 8 inch springform pan combine crumbs with margarine; press onto bottom. Bake 6 minutes; cool on wire rack.
In large mixer bowl mix gelatin with 1/3 cup sugar. Add boiling water and stir until gelatin is completely dissolved, about 2 minutes. Add remaining sugar and pureed cottage cheese, beating until well combined. Add cream cheese, vanilla and lemon juice & peel; continue beating until smooth. Spoon into prepared crust; refrigerate until firm. Just before serving, top with pineapple. Makes 10 servings.