Cream butter and sugar on medium speed for 4-5 minutes. Add egg and vanilla. Mix until combined. Add flour and salt; mix until incorporated and a soft dough forms.

Turn out dough on a lightly floured surface. Using the heel of your hand, fraisage the dough several times to help prevent the dough from cracking and feathering when you roll it out. Form dough into a disc and wrap in plastic wrap. Chill in the fridge for at least 1 to 2 hours, or overnight.

Preheat oven to 350° and lightly spray a 9-inch tart pan with baking spray.

On a lightly floured surface, roll out the tart dough to about ¼” thickness. Use the rolling pin to roll up the dough and transfer to the prepared tart pan. Arrange the dough in the pan and trim away access. Use a fork to dock the bottom of the tart dough. Let the tart dough chill again in the fridge for 30 minutes to 1 hour.

To par bake the tart shell, place the tart pan on a sheet pan. Then lay a sheet of parchment over the tart pan and fill with pie weights, dried beans, or uncooked rice. Bake for 20 minutes. Remove from the oven and allow parchment and weights to cool enough to remove them easily.

Add strawberries and water to a blender; puree until smooth. You should have about 2 cups of puree. Pour puree into a small saucepan over medium heat. Add the sugar and gelatin and stir until the both are dissolved.

Stir together cornstarch and water and add to the strawberry mixture. Cook, stirring continuously, for a couple more minutes, until mixture has thickened and evenly coats the back of a spoon. You should end up with about 1 ½ cups of the strawberry mixture. Place in the fridge for an hour to cool or until completely cool.

Spoon half of the strawberry mixture (about ¾ cup) into the prepared tart crust and spread evenly. Chill in the refrigerator.

In the bowl of a stand mixer with the whisk attachment, add cream cheese and whip on high speed until smooth and creamy. Add about ¼ cup of the cream, and mix on high speed until incorporated. Scrape the sides of the bowl and repeat, adding a little bit of cream at a time until completely incorporated with the cream cheese. Then mix on high speed until stiff peaks form.

Add the remaining strawberry mixture (about ¾ cup) to the whipped cream and whip on high speed again until stiff peaks form. Spoon whipped filling over the strawberry layer in the tart crust and smooth with an offset spatula. Return to the refrigerator until thoroughly chilled, about 2-3 hours or overnight.

When ready to serve, garnish with fresh strawberries, pineberries, meringue cookies, or additional whipped cream if desired.

Store covered in the refrigerator.