An English crumble is the perfect throw-it-together summertime dessert. The less fuss you make over your crumble, the better it will turn out. Case in point: the topping. The lumpier the topping, the better the crumble. Honest. The best way to do this is to mix the dry ingredients together in a bowl (with a whisk or fork), cut the cold butter directly into it, and then proceed with the squishing. When the topping starts to look nice and lumpy, it’s ready. Of course, you could pulse it all together...