When I set out to create a healthier version of key lime pie, I had a lot of goals in mind. First, I wanted it to be no-bake, because #August. And #Texas. Which was tough, since you can’t have key lime pie without that signature graham cracker crust. Second challenge is that I wanted it to be vegan, and I’ve got to admit that it wasn’t easy to recreate the creamy custard filling without using the classic sweetened condensed milk, which, you can probably guess, is not vegan. But I prevailed, and I bet you’ll never guess the secret ingredient that gives this mousse it’s richness. Which is fine, because I’m about to tell you.