Halibut with Mushrooms

Step 1

Preheat the oven to 400°F. Heat 2 tablespoons oil and the butter in a large skillet over medium heat. Add the leeks, shallots, garlic, and 1/8 teaspoon each salt and pepper. Cook, stirring, until the leeks and shallots are translucent, about 3 minutes. Spread into 2 9 × 13-inch baking dishes, dividing evenly. Top with the fish; season with salt and pepper. Set aside.

Step 2

Heat 1 tablespoon oil in the same skillet over medium heat. Add half of the mushrooms and 1/2 teaspoon salt. Raise heat to medium-high; cook, stirring, until tender, 3 to 5 minutes. Scatter the mushrooms over the fish. Repeat with the remaining oil and mushrooms and 1/2 teaspoon salt.

Step 3

Bake until the fish is cooked through, 18 to 20 minutes. Transfer to plates. Drizzle with chive oil. Serve with beet salad.

Chive Oil

Step 4

Cook the chives in a small pot of boiling water until bright green, about 10 seconds. Drain; run under cold water. Pat dry.

Step 5

Put the chives in a blender. With the machine running, add the oil in a slow stream; puree. Let stand 1 hour. Strain through a damp cheesecloth-lined sieve; discard the solids.

Beet Salad

Step 6

Preheat the oven to 400°F. Drizzle the beets with 1/4 cup oil on a rimmed baking sheet; season with salt and pepper. Cover with foil. Bake until tender, about 65 minutes.

Step 7

Let cool. Rub off the skins with paper towels; discard the skins. Cut into wedges. Put the golden and red beets into separate bowls.

Step 8

Whisk the vinegar and remaining oil in a small bowl; season with salt and pepper.

Step 9

Drizzle the beets in the bowls with dressing. Season with salt and pepper, if desired. Toss together just before serving.