One can of evaporated milk (assuming sweetened), one 8oz pack of cream cheese. Use mixer to blend together until smooth. Add a half cup of pineapple juice and mix again. Pour into a pre-made graham cracker crust. Let it set up in the fridge for a couple hours. I usually do this with lime juice, but the pineapple should have plenty of acidity to make the pie set up the same.

Edit: I’m thinking sweetened condensed milk, not evaporated milk. Oops