Combine breadcrumbs, butter, brown sugar, cinnamon, nutmeg, and salt in a bowl.
Layer half the apples in the dish. Sprinkle 1 tablespoon of water over the apples.
Top with half the crumb mixture.
Repeat layers, finishing with crumbs on top.
Bake uncovered for 40 minutes, until apples are tender and topping is golden. Serve warm, plain or with vanilla ice cream.
Notes
You can add a little lemon juice to the apples.
The water softens and steams the apples.
This isn’t the traditional way, but it’s easier and leaves fewer dry spots. The traditional way is to add the butter and water to the top at the very end, after layering.
Light or dark brown sugar both work.
Cover and store leftovers in the fridge for up to 3 days.