Shrimp and Herb Canapés | Saveur

Ingredients

• 2 cups packed watercress leaves
• 1 cup packed parsley leaves
• 1 cup packed tarragon leaves
• 1 lb. (4 sticks) unsalted butter, softened
• 4 tbsp. fresh lemon juice
• Kosher salt and freshly ground black pepper, to taste
• 8 oz. unpeeled medium shrimp
• 1 loaf Pullman bread, cut lengthwise into six ¼″-thick slices, crusts removed
• 1 tbsp. capers, rinsed, for garnish
• 4 cooked, peeled medium shrimp, thinly sliced lengthwise, for garnish
• 4 radishes, thinly sliced, for garnish
• 3 chives, cut into 2″ lengths, for garnish