Instructions: 1. Preheat oven to 375 degrees. Toast the walnuts by spreading on a pie plate and heating in oven until fragrant (about 7 minutes). Chop the nuts medium-fine.

2. Combine the flour, brown sugar, cinnamon and salt (if using unsalted butter) in a mixing bowl. Drizzle the melted butter and maple syrup over the top and blend on low speed until crumbly. Add the chopped nuts and mix well. (The topping can be prepared up to a week ahead and refrigerated.)

3. Put the diced or sliced fruit in a large bowl. Add the sugar and taste; add more if necessary. Sprinkle the flour over the fruit and mix gently. Turn mixture into a 2-quart baking dish.

4. Spoon the topping over the fruit, pressing down lightly. Place the dish on a baking sheet (if necessary) to catch any overflow. Bake on the center rack of oven until the topping is golden brown and the juices have thickened slightly, about 35-45 minutes.

5. Serve warm with vanilla ice cream, if desired.

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