Instructions

  1. Preheat the oven to 450ºF.
  2. On a large rimmed baking sheet, toss the potatoes with the garlic, rosemary, and 1 Tbs oil.
  3. Season generously with salt and pepper.
  4. Arrange potatoes in a single layer, cut side down.
  5. Bake, tossing potatoes once, until beginning to brown, about 20 minute.
  6. Meanwhile, rub fillets with remaining tsp oil and season all sides with salt and pepper.
  7. Remove baking sheet from the oven.
  8. Add the tomatoes and olives to the potatoes; stir to combine.
  9. Push the vegetable mixture to one side of the baking sheet and place the fillets flat on the baking sheet next to the vegetables.
  10. Return the baking sheet to the oven and roast until the fish is cooked through and potatoes are brown and tender, about 15-20 minute.
  11. Transfer the fish and vegetables to a serving platter and serve immediately.