Step 1

1 Position the rack in the middle of the oven and preheat to 375 degrees

Step 2

2 Sprinkle the halibut with salt and pepper

Step 3

3 In a large, oven-safe, nonstick skillet, combine the oil, shallot, garlic, anchovies, oregano and pepper flakes, if using

Step 4

4 Set the skillet over medium-low heat and cook, stirring, until the shallot begins to soften, about 4 minutes

Step 5

5 Stir in the tomatoes and their juice, olives and capers, then nestle the halibut into the sauce

Step 6

6 Raise the heat to medium-high and bring the sauce to a simmer

Step 7

7 Transfer the uncovered skillet to the oven and bake for about 10 minutes, or until the fish flakes apart when gently prodded with a paring knife and registers 130 degrees on an instant-read thermometer

Step 8

8 Using a spatula, transfer the halibut to a serving platter

Step 9

9 Stir the sauce to recombine, then spoon it over the halibut

Step 10

10 Sprinkle with the parsley and serve, family-style