Preheat the oven to 350 degrees. Butter a large cast-iron skillet. Combine the apples, cranberries, granulated sugar, flour, ¼ teaspoon salt, and lemon juice in a large bowl, and toss well. Transfer to the skillet. Dot the top with the cold butter pieces.
Wipe out the bowl, and make the topping. Add the flour, almonds, oats, brown sugar, ginger, nutmeg, and ¼ teaspoon salt to the bowl. Toss to combine. Cut the cutter into five or six pieces. Work the butter in with your fingers until the topping is evenly moistened.
Squeeze clumps of the topping in your palm, a few tablespoons at a time, and scatter them over the fruit. Bake until the crumble topping is golden and crisp and the fruit juices are bubbly, about 40 to 50 minutes. Cool on a rack, and serve warm or at room temperature.