Ingredients

  • 1 stick unsalted butter, softened
  • 1 tablespoon finely chopped capers
  • 1 tablespoon fresh lemon juice
  • 1 tablespoon chopped parsley
  • Salt
  • Four 1- to 1 1/4-pound whole branzino or striped bass, scaled and gutted
  • 1 lemon, sliced into 8 rounds
  • 4 large rosemary sprigs
  • 3 tablespoons extra-virgin olive oil