Here's one my Mom used to make for large gatherings. No baking at all. Serves 12 - 15.
1 pkg chocolate cookies
3T melted butter or margarine
1 pkg lime Jello
1/2 cup hot water
1/4 cup lemon juice
1/2 cup sugar
1 lg can Carnation evaporated milk
1 T lemon rind or 1/2 t lemon extract
Crush cookies and mix with melted butter. Keep out one cup and pat the remainder into the bottom of a 9x13 pan. Chill in refrigerator while you add hot water to Jello and sugar and dissolve. Add lemon juice and a little green food color (if desired). Add lemon rind or extract. Refrigerate until thickened. Whip Carnation milk until stiff, then add jello mixture. Pour into pan over cookie crumbs and sprinkle the one cup of reserved crumbs over the top. Chill. Can be served with whipped cream.
PS I have no idea why, but she called this Lime Frozen Pie even though it wasn't pie and it wasn't frozen.