Fresh raspberries piled into a pre-baked crust, topped with a warm jello syrup, and chilled until perfectly set. Just 15 minutes of active prep, then the fridge does the rest.
Bake the pie crust according to the package or recipe directions for a single crust pie. Set it aside to cool completely.
Whisk the granulated sugar and cornstarch together in a large saucepan until combined and any lumps are gone.
Add the water and bring the mixture to a boil over high heat, stirring constantly.
Once boiling, reduce the heat to medium-high and cook for 2 to 3 minutes, stirring the whole time, until the mixture thickens and turns translucent. Remove the pan from the heat.
Add the dry Jello mix and whisk until it dissolves completely into the syrup. Let the mixture cool for 15 minutes, whisking occasionally.
Arrange the fresh raspberries evenly in the cooled pie crust. Pour the Jello syrup over the berries and use a rubber spatula to gently press them down into the filling and smooth the surface.
Refrigerate for at least 3 hours or overnight until fully set. Serve with whipped cream or whipped topping if desired.
Notes
Use fresh raspberries. Frozen raspberries release too much liquid as they thaw and will prevent the filling from setting properly.
Don't rush the syrup. Boil it for a full 2 to 3 minutes, stirring constantly, until it turns visibly translucent. If it still looks cloudy or thin, give it another minute.
Make sure the Jello dissolves completely into the hot syrup before you let the mixture cool.
This pie is best made the night before. It needs at least 3 hours to set, but overnight gives you a cleaner slice.
Use a large saucepan. The syrup bubbles aggressively and will splatter in a small pot.