Preheat your oven to 350°F (175°C).
In a large mixing bowl, toss the sliced apples with maple syrup, ground ginger, cinnamon, and lemon juice until well combined. Spread the apple mixture evenly in the bottom of the baking dish.
In another bowl, mix together the rolled oats, all-purpose flour, brown sugar, salt, and ground ginger for the crumble topping.
Pour the melted butter over the oat mixture and stir until the ingredients are combined and crumbly.
Sprinkle the crumble topping evenly over the apples in the baking dish.
Bake in the preheated oven for 30-35 minutes, or until the apples are bubbly and the topping is golden brown.
Remove from the oven and let it cool slightly before serving.
Serve warm, optionally with a scoop of vanilla ice cream or whipped cream for added indulgence.