Chicken Liver Crostini

Heat 3 tbsp. oil in a 12" skillet over medium-high heat. Rinse chicken livers and pat dry with paper towels. Add to skillet and cook, flipping once, until browned and slightly pink on the inside, about 4 minutes. Remove skillet from heat, transfer livers to a cutting board using a slotted spoon (so oil is left behind), and finely chop them. Transfer to a plate and set aside.

Return skillet to medium-high heat. Add anchovies and cook, stirring frequently, until they dissolve in the oil, 2–3 minutes. Add onions, carrots, celery, and garlic; cook, stirring, until soft, 10 minutes. Add vin santo and cook, stirring, until evaporated, about 30 seconds. Add chicken broth and cook until liquid is mostly evaporated, about 2 minutes. Add livers and their juices, along with parsley, capers, lemon juice, and zest; season mixture with salt and pepper and cook until hot, about 2 minutes. Remove skillet from heat; let cool slightly. Transfer liver mixture to bowl of a food processor and pulse until chunky (or, if you prefer, purée until smooth). Refrigerate. Put bread on a baking sheet and brush with remaining oil; bake until golden, about 10 minutes. Let cool slightly, then spoon liver mixture over toasts and serve.