Ah...yes.. Soylent Green (falsley advertised as high-energy plankton-yea right) is one of my all time favorite sci-fi movies and great snack idea.

You'll need:

1 package of Saltine crackers

green food coloring

fine mist spray bottle

3/4 cup of water.

Rent the DVD Soylent Green (1973) then mix the food coloring with water and spray saltines (gently misting) Dry 30 seconds on high in microwave and serve with your favorite Cracker Barrel Cheese. These little wafers really set the mood and the taste..well it "varies from person to person". You can also make Soylent Yellow and Soylent Red both of which were advertised as "high-energy vegetable concentrates." (and yes you eat them while watching the movie)