Once the butter has melted, stir in the apples, 3 tbsp of water, sugar, cinnamon, nutmeg, salt, and vanilla.
4 large Bramley apples, peeled, cored, and diced, 1/3 cup sugar, 5 tbsp water, divided, 1 tsp cinnamon, 1/4 tsp nutmeg, 1/8 tsp vanilla bean paste, 1/8 tsp salt