strawberry guava pie
(variation on a theme)
Picture
Once I figured out the appropriate process for Lemonade Pie, it was time to play around. 

Why not guava? It works too, but strawberry-guava concentrate is much sweeter than lemonade concentrate. Adding lemon juice brings the recipe up up to 5 ingredients and cuts down the heavy sweetness and brings out the guava's brightness better. But like its cousin, the result is well-worth the minimal effort and freezer space.
1 can of frozen strawberry-guava concentrate
  I used Hawaii's Own brand (from Safeway)
1 can of condensed milk (the Eagle kind)
Juice of 1 lemon or 2 lemons
1 large tub of Cool Whip
12-18 pre-made graham cracker pie crust or 1 9-inch pre-made graham cracker pie crust
Sliced strawberries or raspberries
Mix strawberry-guava concentrate and condensed milk. Add the juice of the first lemon and stir well. If it's still too sweet, add the second lemon. Fold in Cool Whip. Dump into the graham cracker crust tarts and freeze. Right before serving, top with your favorite berries.