Salted Pistachio Crumbles With Berries and Ice Cream

Mix pistachios, flour, sugar, cornmeal, and 1 tsp. salt in a large bowl, then drizzle in butter and work in with your fingers or the handle of a wooden spoon until small pebble-to pea-size clumps form. Scatter crumble over a parchment-lined rimmed baking sheet, trying not to break it up too much, and bake, tossing halfway through, until golden brown, 20–25 minutes. Let cool.