Anna Di Bene, Oltranti's grandmother, never let anything go to waste in her kitchen in Lucca, Italy. Whenever she cooked chicken, she saved the livers for this delicious antipasto. Spicy red-pepper flakes and salty capers cut through the richness of the topping.
Cooks' notes:
Liver mixture, without parsley, can be made 1 day ahead and chilled. Reheat, then stir in parsley, before spreading on toasts.