01 - Preheat your oven to 350°F. Thoroughly butter a 9-inch baking dish to prevent sticking.
02 - In a large mixing bowl, combine the sliced apples, sliced pears, fresh or frozen cranberries, chopped dried apricots, brown sugar, lemon juice, 1 teaspoon ground cinnamon, 1/4 teaspoon ground nutmeg, and 2 tablespoons all-purpose flour. Toss all ingredients gently to ensure the fruit is evenly coated.
03 - Transfer the prepared fruit mixture into the buttered 9-inch baking dish, spreading it out evenly to form a single layer.
04 - In a separate bowl, combine the old-fashioned rolled oats, 1/2 cup all-purpose flour, 1/3 cup brown sugar, chopped nuts (walnuts or pecans), 1/2 teaspoon ground cinnamon, and salt. Add the cold, cubed unsalted butter. Using your fingertips or a pastry blender, work the butter into the dry ingredients until the mixture resembles coarse crumbs.
05 - Evenly sprinkle the prepared crisp topping over the fruit mixture in the baking dish.
06 - Bake the fruit crisp in the preheated oven for 35 to 40 minutes, or until the topping is beautifully golden brown and the fruit filling is visibly bubbling around the edges.
07 - Allow the crisp to cool slightly before serving. This dessert is best enjoyed warm, optionally accompanied by vanilla ice cream or freshly whipped cream.