Creating Classic Malvern Apple Custard Pudding is simple if you follow these steps:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C).
2. Prepare the Apples: Peel, core, and slice the apples into thin wedges. Place them in a buttered baking dish.
3. Make the Custard Mixture: In a mixing bowl, whisk together the eggs and granulated sugar until well combined and slightly frothy.
4. Stir in Milk: Gradually add the whole milk and vanilla extract to the egg mixture, whisking continuously to combine.
5. Add Flour and Spices: Sprinkle in the flour, ground cinnamon, and salt. Mix until the batter is smooth and free of lumps.
6. Incorporate Butter: Stir in the melted butter and lemon zest (if using) to enhance the flavor.
7. Combine Apples and Custard: Pour the custard mixture over the sliced apples in the baking dish, ensuring even coverage.
8. Bake: Place the dish in the preheated oven and bake for 45-50 minutes or until the custard sets and the top is lightly golden.
9. Cool: Remove from the oven and let the pudding cool for 10-15 minutes before serving.

These steps will guide you in creating this incredible pudding effortlessly.