Mini Shrimp Rolls

INGREDIENTS

• Freshly ground black pepper
• 1/4 cup (1/2 stick) unsalted butter, melted
• 1/2 cup celery leaves or crushed potato chips
• 2 teaspoons prepared horseradish
• 1 tablespoon finely chopped fresh chives
• 1 tablespoon grapeseed oil
• 2 teaspoons fresh lemon juice
• 1/4 cup plus 1 tablespoons mayonnaise
• 1 small celery stalk, peeled, finely chopped (about 3 tablespoons)
• 24 mini soft dinner rolls (each about 1 1/2 x 1 1/2"; such as Martin's potato rolls or King's Hawaiian)
• Kosher salt
• 1 pound medium shrimp, shelled, deveined