Combine sugar, cornstarch, and water in a saucepan. Whisk the mixture together until smooth. Bring mixture to a boil over high heat, stirring constantly. Reduce heat to medium, cook, continually stirring, for 2 to 3 minutes or until mixture has thickened. Remove from heat immediately. Stir in gelatin until dissolved. Refrigerate for 20 minutes until slightly cooled.
Place hulled strawberries in a large bowl. Fold gelatin mixture into berries until all berries are covered. Spoon berries into baked single pie crust. Refrigerate until set.