Pie maker mini baked lemon cheesecakes

Name: Pie maker mini baked lemon cheesecakes
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Cuisine: British, European
Ingredients: 12 (180g) McVitie’s The Original Digestives Biscuits; 100g butter, melted and cooled; 500g cream cheese, at room temperature, chopped; 215g (1 cup) caster sugar; 4 eggs; 2 tbsp fresh lemon juice; 1 tbsp finely grated lemon rind, plus extra lemon rind, shredded, to serve (optional); Fresh mixed berries, chopped, to serve (optional); Whipped cream, to serve (optional)