Japanese Cheesecake with Salted Caramel Sauce

Ingredients

• 250 g Philadelphia Cream Cheese
• 6 egg yolks
• 140 g caster sugar, divided
• 60 g unsalted butter
• 100 mL full cream milk
• 1 tbsp lemon juice
• 2 tsp lemon zest
• 60 g plain flour
• 20 g cornflour
• ¼ tsp salt
• 6 egg whites
• ¼ tsp cream of tartar
• 1 cup caster sugar
• ½ cup water
• 50g unsalted butter
• ¾ cup thickened cream
• ½ tbsp vanilla extract
• 1 tsp sea salt