These vegan no-bake avocado lime tarts are full of nourishing ingredients. The lime adds a zip to the creamy avocado and cashews in the rich and velvety filling. Although these tarts are simple to whizz together, they will need an hour in the freezer to firm up. You can store them in the freezer, if you like, and just pop them in the fridge 10 minutes before serving to let them thaw slightly.