"My mom made this when we were kids and we all loved it. It is a pie that when you say 'jello pie' you can remember the taste and want some. It's easy to make, refreshing to eat, and everyone will enjoy it."
Mix pineapple, sugar, and eggs together in a saucepan; bring to a slow boil. Reduce heat to low and continue cooking until mixture thickens, 3 to 4 minutes. Remove saucepan from heat and stir gelatin mix into pineapple mixture. Set aside to cool.
Line a pie dish with enough vanilla wafers to cover bottom.
Beat milk in a large bowl using an electric mixer until thickened, about 3 minutes. Stir gelatin mixture into whipped milk and pour over vanilla wafers. Refrigerate until set, about 8 hours.