Preheat and prep the pan. Heat your oven to 350°F (175°C). Lightly grease a 9x9-inch baking dish or a similar 2-quart casserole.

Soften the dates. If your dates are firm, soak them in hot water for 10 minutes. Drain well. This helps them blend into a smooth paste.

Make the date paste. In a blender or food processor, combine pitted dates, 1/3 cup water or apple juice, vanilla, 1 teaspoon cinnamon, a pinch of salt, and lemon juice. Blend until smooth and spreadable. If needed, add a splash more liquid. You’re aiming for a thick caramel-like consistency.

Slice the apples. Peel if you prefer (optional) and core. Slice into 1/4-inch wedges. Toss the apples in a large bowl with 1 teaspoon cinnamon, nutmeg, and a small pinch of salt.

Combine apples with date paste. Spoon the date paste over the apples and mix until every slice is well coated. If you like, stir in a handful of raisins or dried cranberries for extra texture.

Make the crumble topping. In another bowl, stir together oats, almond flour, chopped nuts, melted coconut oil or butter, and a pinch of salt. The mixture should look sandy and clump when pressed. If it seems dry, add 1 more tablespoon of melted fat.

Assemble. Spread the apple mixture evenly in your baking dish. Crumble the oat topping over the apples, leaving a few gaps so steam can escape.

Bake. Place the dish on the center rack and bake for 35–45 minutes, until the topping is golden and the apples are tender and bubbling at the edges. If the top browns too fast, tent loosely with foil for the last 10 minutes.

Rest and serve. Let the crumble sit for 10–15 minutes to set the juices. Serve warm. It’s lovely on its own, with plain Greek yogurt, or a small scoop of vanilla ice cream if you’re not strictly avoiding added sugar.