|2||sli||Orange (or 3)|
Shake everything with shaved ice, pour over fresh ice in a tumbler (or Collins, if you're feeling modern - a julep cup if you're feeling posh), garnish with fresh fruit in season, add straws.
The sherry can be just about any kind. The sugar can be swapped out for just about any sweetener, as long as it plays well. The orange, which I'm pretty sure gets shaken with the other ingredients, can be swapped out. Just make sure there's a straw and some tasty fruit on top.