Make strawberry sauce: Combine strawberries, sugar, and lemon juice in a saucepan. Cook on medium-low for 10 minutes, stirring occasionally, until soft.
Puree the sauce: Use an immersion blender or food processor to blend the mixture until smooth. Cool in the fridge.
Prepare crumble: Preheat oven to 350°F. Pulse Nilla wafers, melted butter, and freeze-dried strawberries in a food processor until combined.
Make crust: Press crumble mixture into the bottom and halfway up the sides of a 9-inch springform pan. Save 1 cup of crumbs. Bake for 10 minutes and cool.
Make cheesecake filling: Beat cream cheese and sugar until smooth. Add milk, flour, and vanilla, mixing until just combined.
Fill the crust: Pour cheesecake filling into cooled crust. Spread evenly. Bake at 350°F for 35-40 minutes, until the center is firm.
Cool the cheesecake: Let the cheesecake cool at room temperature, then chill in the fridge for 4 hours or overnight.
Assemble: Remove cheesecake from pan, top with half of the strawberry sauce, and sprinkle with reserved crumble.
Serve: Slice, serve, and enjoy!