Preheat oven to 160C/320F, or 140C/295F fan/convection.
Prepare a buttered and parchment-lined 20cm/8-inch springform cake tin with the base upside down and the sides lined.
Break biscuits into a food processor and blitz to fine crumbs; add melted butter and blitz until the mixture resembles wet sand.
Press the biscuit mixture over the base and up the walls of the prepared tin, flattening the base firmly.
Beat cream cheese until just smooth, then beat in flour, vanilla, sour cream, sugar, and lemon zest until just combined.
Add eggs one at a time, beating only until each is incorporated, then pour the filling into the prepared crust.
Bake for 55 minutes until very lightly golden, nearly flat, and gently jiggly in the center.
Cool in the oven with the door open 20cm/8 inches, then refrigerate in the pan for at least 4 hours.
Remove the pan sides and slide the cheesecake from the parchment.
Combine diced strawberries, lemon juice, white sugar, vanilla, cornstarch, and water; cook until syrupy, then cool and spoon over slices with the halved strawberries.