Prep
Preheat oven to 350°F.
Line the bottom of a springform pan with parchment paper.
Bring cream cheese to room temperature.
Fruit Fool
Add strawberries, rhubarb, granulated sugar, and lemon juice to a saucepan.
Cook over medium heat for 10–15 minutes, stirring often, until soft and jammy.
Remove from heat and cool completely.
Crust
Mix graham cracker crumbs, melted butter, and salt.
Press firmly into the bottom of the pan.
Bake for 10 minutes, then cool completely.
Cheesecake Filling
Beat cream cheese until smooth.
Add granulated sugar and vanilla; mix until combined.
In a separate bowl, whip cream with powdered sugar to soft peaks.
Gently fold whipped cream into the cream cheese mixture.
Assemble
Fold half of the cooled fruit mixture into the filling.
Spread filling evenly over the crust.
Swirl remaining fruit on top.
Chill at least 4 hours, preferably overnight.
Slice with a warm knife and serve cold.