This will take about 30 minutes to complete plus 3 hour chill time represented under "cook time".
Arrange dessert cups on a tray(s).
Crumble crust and set aside.
Mix sweetened condensed milk, non dairy whipped topping together.
Add in key lime and lemon juice, mix until fully blended.
Add the crumbled pie crust into each dessert cup, about a 1/2 inch high.
Put filling into piping bag and pipe filling into dessert cups to about a 1/4 inch from top.
Chill for 3 hours.
Pipe additional whipped topping on top of filling, sprinkle with macadamia nuts and lime zest.
Refrigerate until ready to serve.