Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      9 inch        graham cracker
   1      packet        knox unflavored
                        -- gelatin
   3      tablespoons   lime juice
                        lime slices
     1/2  cup           boiling water
   1      cup           evaporated skim milk
   9      packets       equal -- (1 gram )
   1      teaspoon      vanilla -- (aspartame)
                        substitute
   2      drops         green food coloring

Preparation:

Sprinkle gelatin over lime juice and let it stand for i minute. Add boiling water and sweetener to gelatin mixture and stir until gelatin is dissolved. Refrigerate about 45 minutes or until slightly thickened. Combine milk and vanilla and freeze 30 minutes. Remove from freezer and whip at high speed until stiff. Stir lime juice and food coloring into whipped milk. (Save remaining 1/2 lime for garnish.) Slowly blend gelatin mixture into whipped milk. Spoon pie filling into crust. Chill until firm. Garnish with lime zest and lime slices. Cut into 8 even portions and serve