Assemble the strawberries: Add 2 cups of the hulled fresh strawberries to the fully-baked pie crust and set aside.
1 recipe 9-inch pie crust
Cook the filling: In a medium saucepan, combine the remaining 2 cups of strawberries with the sugar, water, lemon juice, and cornstarch. Using an old-fashioned potato masher, mash the strawberries until the mixture is nearly a liquid with some pieces of berry remaining. Heat the mashed berry mixture over medium heat, stirring occasionally, 3-5 minutes. When the mixture starts to bubble around the edges, stir constantly until bubbling throughout and thickened, 3 minutes. When done, the mixture will have slow, large bubbles and be thick. Remove from the heat and stir in the food coloring (if using).
4 cups fresh strawberries, ¾ cup granulated sugar, ¼ cup water, 2 tbsp fresh lemon juice, 3 tbsp cornstarch, red food coloring (optional)
Fill the pie: Pour the strawberry mixture immediately over the fresh strawberries in the pie shell. Allow to cool to room temperature, about 1 hour. Place in the refrigerator until fully chilled, 4-6 hours. Serve with fresh whipped cream.