Prepare the filling: In a saucepan, combine sugar, lemon juice, cornstarch, salt, and water. Stir over medium heat until it thickens and becomes translucent.

Mash strawberries: Mash half of the strawberries in a bowl, leaving the rest whole. Add the mashed strawberries to the thickened mixture and stir well.

Assemble the pie: Pour the strawberry mixture into the pre-baked pie crust, spreading evenly. Place the whole strawberries on top, arranging them decoratively.

Chill: Refrigerate the pie for at least 4 hours or until the filling is set.

Serve: Top with whipped cream before serving for an extra indulgent treat.