In a food processor, crush graham crackers, brown sugar and melted butter together until fine crumbs form.
Place about 1/3 cup of crumbs into the bottom of the jar and press into the bottom and up the side a little to form a crust.
Wipe out the food processor and cream together cream cheese, juice, condensed milk and zest together until well blended.
Divided mixture evenly between all the jars. Spread the tops evenly.
Chill for 1 hour before serving.
Garnish with a dollop of whipped cream and lime slice.