Mango-and Sour-Cherry Macaroon Crumble

Around Passover at our house macaroons tend to proliferate like wire coat hangers from the dry cleaners. In addition to the ones I make, there are the cakey commercial variety I purchase from my nephews, who peddle Passover sweets as a fund-raiser for their school. A lively fruit crumble is a fresh way to make use of the leftovers, and other suggestions follow this recipe (see Cook’s Note).