Valentine's Day Lemon-Blueberry Cheesecake

• Crush the speculaas pieces in a food processor until you get fine crumbs (see Tip). 
• Melt the butter in a saucepan and mix in the crushed speculaas. 
• Add the mixture to a 24cm cake tin and press down firmly with the back of a spoon to form the base layer. 
• Cool the speculaas base in the fridge until the filling is ready. 

Tip: You can also add the speculaas pieces to a ziplock bag and crush them with a rolling pin.