In a food processor fitted with a sharp blade, blitz the biscuits until finely crumbed and sandy in appearance. Pour in the melted butter and let the processor run on low speed until the mixture clumps together.
Tip into the base of a 9" springform pan and press down evenly and firmly, taking the mixture up to the sides of the pan as well. Place in the fridge for 30 minutes.
Preheat the oven to 160 C. Rinse the strawberries very well and cut off the tops. Wipe out the bowl of the food processor and add the strawberries. Blitz till a smooth puree forms.
Now make the filling. In a large mixing bowl, beat the cream cheese and yoghurt together until smooth. Add the sugar, lemon zest and vanilla and blitz to combine.
Add the eggs, one at a time, briefly beating after each to incorporate it. Finally, beat in the pureed strawberries. Remember not to over-beat the batter because it creates too much air which could cause the cheesecake to crack as it bakes.
Pour the filling over the chilled crust and tap the pan gently on the counter to remove any air bubbles.
Bake for 45 to 50 minutes, or until you see the edges are puffing up and lightly browned (small cracks on the edges are ok) and the center is still a little wobbly. Let the cheesecake cool in the oven itself for 20 minutes, with the oven door slightly open.
Let the cheesecake cool to room temperature for another hour and you will see the center has firmed up. In my experience, cheesecakes with fruit puree don't become quite as firm in the center as a regular cheesecake and have a softer, creamier texture. You can bake the cheesecake for an extra 5 to 10 minutes but keep in mind that the risk of cracks forming on the top is higher with a longer bake time.
Refrigerate for at least 6 hours, but preferably overnight for the best texture.
When you are ready to serve the cheesecake, whip the cream, sugar and vanilla together in a mixing bowl, using a hand mixer on high speed. Whip till soft peaks form, then spread onto the top of the cheesecake. Decorate with fresh strawberries, slice and dig in!
Cheesecake must be stored in the fridge at all times in an airtight container. It will keep for 4 to 5 days. It can also be frozen for about a month, as long as strawberries and cream topping is added only after defrosting. Happy baking!