You can choose to use a bowl and electric mixer, a food processor, or a blender.
Combine the cream cheese, sweetened condensed milk, lemon juice, and vanilla together until smooth. Pour mixture into crust and refridgerate about 3 hours before serving.
To dress this dessert up-
Chocolate Marbled - use a chocolate cookie crust and drizzle with chocolate syrup and run a buter knife arounf to make it looke marbled.
Fruit - top with strawberries, blueberries, or fruit pie filling.
White chocolate - grate white chocolate and sprinkle liberally in the bottom of the crust before adding filling, you can also mix some gratings into the filling and top it with some as well.