Roasted Cod with Warm Tomato-Olive-Caper Tapenade

Preheat oven to 450 degrees F. Coat a baking sheet with cooking spray.

Rub cod with 2 teaspoons oil. Sprinkle with pepper. Place on the prepared baking sheet. Transfer to the oven and roast until the fish flakes easily with a fork, 15 to 20 minutes, depending on the thickness of the fillet.

Meanwhile, heat the remaining 1 teaspoon oil in a small skillet over medium heat. Add shallot and cook, stirring, until beginning to soften, about 20 seconds. Add tomatoes and cook, stirring, until softened, about 1 1/2 minutes. Add olives and capers; cook, stirring, for 30 seconds more. Stir in oregano and vinegar; remove from heat. Spoon the tapenade over the cod to serve.