Thanks! All of these are great ideas that I will have to try. Sounds like the Sugar Free jello is quick and easy whereas the recipe with real key lime juice is going to have the correct taste. I'll do some carb computations on these.

1/2 cup lime juice is estimated to be between 8 and 11 g of carbs so let's say 9.5 g.

egg yolks are 0.61 g per yolk

1 cup of heavy whipping cream is 6.64 g of carbs

Splenda -- ??? g of carbs