Preheat the Oven: Set it to 375°F (190°C). Let it warm while your hands remember how to work with butter.
Make the Topping: In a big bowl, mix flour, brown sugar, salt, and 2 tbsp granulated sugar. Add the butter and press it through with your fingers until you’ve got chunky crumbles. Stir in the oats. Freeze it while you work on the apples.
Prepare the Apples: Toss the chunks with lemon juice, cinnamon, and the rest of the granulated sugar. Use your hands if you want. It’s fine to smell like fruit.
Assemble and Bake: Spread the apples into a shallow 2-quart dish. Top evenly with the chilled crumble. Place on a baking sheet in case it bubbles over. Bake for 55–65 minutes, until the top is golden and the edges hiss.
Cool and Serve: Let it sit for 10 minutes so the juices settle. Then serve warm. With cream, with nothing, with someone, or alone.
