1. Preheat oven to 400°.
2. Arrange fish on a parchment paper-lined baking sheet coated with cooking spray. Sprinkle fish evenly with salt and pepper.
3. Place pesto, rind, olives, and bread in the bowl of a mini food processor; pulse until finely chopped. Spoon olive mixture evenly over fish, pressing to adhere. Bake at 400° for 12 minutes or until fish flakes easily when tested with a fork.