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Paleo Cod Baked in Foil with Leeks and Carrots

By America's Test Kitchen

Published on July 1, 2016

Yield

Serves 4

Paleo Cod Baked in Foil with Leeks and Carrots

Ingredients

1 pound leeks, white and light green parts only, halved lengthwise, cut into 2-inch-long matchsticks, and washed thoroughly2 carrots, peeled and cut into 2-inch-long matchsticksKosher salt and pepper ¼ cup ghee, softened2 garlic cloves, minced1 ½ teaspoons grated lemon zest, plus lemon wedges for serving1 teaspoon minced fresh thyme 2 tablespoons minced fresh parsley ¼ cup water 4 (6- to 8-ounce) skinless cod fillets, 1 to 1 ¼ inches thick

Before You Begin

Haddock, red snapper, halibut, and sea bass will also work well in this recipe as long as the fillets are 1 to 1 1/4 inches thick. Open each packet promptly after baking to prevent overcooking.

Instructions

  1. Adjust oven rack to lower-middle position and heat oven to 450 degrees. Combine leeks and carrots in bowl and season with salt and pepper. In separate bowl, combine ghee, half of garlic, 1/2 teaspoon lemon zest, thyme, 1/2 teaspoon salt, and 1/8 teaspoon pepper. In third bowl, combine parsley, remaining garlic, and remaining 1 teaspoon zest; set aside for serving.
  2. Cut eight 12-inch-square sheets of aluminum foil and arrange 4 sheets flat on counter. Divide vegetable mixture among foil sheets, mounding it in center, and sprinkle with water. Season cod with salt and pepper and place on top of vegetables. Spread ghee mixture evenly over cod.
  3. Place second square of foil on top of cod. Press edges of foil together and fold over several times until packet is well sealed and measures about 7 inches. Place packets on rimmed baking sheet, overlapping as needed, and bake for 15 minutes.
  4. Carefully open foil, allowing steam to escape away from you. Using thin metal spatula, gently slide cod and vegetables and any accumulated juices onto plates. Sprinkle with parsley mixture and serve with lemon wedges.
Paleo Cod Baked in Foil with Leeks and Carrots

Paleo Cod Baked in Foil with Leeks and Carrots

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By America's Test Kitchen
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Yield

Serves 4

Ingredients

1 pound leeks, white and light green parts only, halved lengthwise, cut into 2-inch-long matchsticks, and washed thoroughly
2 carrots, peeled and cut into 2-inch-long matchsticks
Kosher salt and pepper
¼ cup ghee, softened
2 garlic cloves, minced
1 ½ teaspoons grated lemon zest, plus lemon wedges for serving
1 teaspoon minced fresh thyme
2 tablespoons minced fresh parsley
¼ cup water
4 (6- to 8-ounce) skinless cod fillets, 1 to 1 ¼ inches thick

Ingredients

1 pound leeks, white and light green parts only, halved lengthwise, cut into 2-inch-long matchsticks, and washed thoroughly
2 carrots, peeled and cut into 2-inch-long matchsticks
Kosher salt and pepper
¼ cup ghee, softened
2 garlic cloves, minced
1 ½ teaspoons grated lemon zest, plus lemon wedges for serving
1 teaspoon minced fresh thyme
2 tablespoons minced fresh parsley
¼ cup water
4 (6- to 8-ounce) skinless cod fillets, 1 to 1 ¼ inches thick

Ingredients

1 pound leeks, white and light green parts only, halved lengthwise, cut into 2-inch-long matchsticks, and washed thoroughly
2 carrots, peeled and cut into 2-inch-long matchsticks
Kosher salt and pepper
¼ cup ghee, softened
2 garlic cloves, minced
1 ½ teaspoons grated lemon zest, plus lemon wedges for serving
1 teaspoon minced fresh thyme
2 tablespoons minced fresh parsley
¼ cup water
4 (6- to 8-ounce) skinless cod fillets, 1 to 1 ¼ inches thick

Why This Recipe Works

Cooking mild fish like cod en papillote—in which individual portions are steamed quickly and gently within tightly sealed parchment parcels—is a simple way to enhance its delicate flavor. While most recipes call for a small amount of wine to impart a heady fragrance, we wanted to find a paleo-friendly alternative, so we created a flavor-packed paste of ghee, fresh herbs, and lemon zest to gently bathe the cod as it steamed. Leeks and carrots, cut into matchsticks, provided subtle sweetness. To simplify the preparation, we found that foil was easier to work with than parchment paper, since it stayed sealed without much effort. Placing the fish on top of the vegetables prevented the fillets from drying out by ensuring that the delicate fish wasn’t in direct contact with the hot baking sheet. We baked the parcels on the oven’s lower-middle rack to concentrate the exuded liquid and deepen the flavor. Finally, we sprinkled the finished dish with a bright mixture of parsley, lemon zest, and garlic.

Before You Begin

Haddock, red snapper, halibut, and sea bass will also work well in this recipe as long as the fillets are 1 to 1 1/4 inches thick. Open each packet promptly after baking to prevent overcooking.

Instructions

  1. Adjust oven rack to lower-middle position and heat oven to 450 degrees. Combine leeks and carrots in bowl and season with salt and pepper. In separate bowl, combine ghee, half of garlic, 1/2 teaspoon lemon zest, thyme, 1/2 teaspoon salt, and 1/8 teaspoon pepper. In third bowl, combine parsley, remaining garlic, and remaining 1 teaspoon zest; set aside for serving.
  2. Cut eight 12-inch-square sheets of aluminum foil and arrange 4 sheets flat on counter. Divide vegetable mixture among foil sheets, mounding it in center, and sprinkle with water. Season cod with salt and pepper and place on top of vegetables. Spread ghee mixture evenly over cod.
  3. Place second square of foil on top of cod. Press edges of foil together and fold over several times until packet is well sealed and measures about 7 inches. Place packets on rimmed baking sheet, overlapping as needed, and bake for 15 minutes.
  4. Carefully open foil, allowing steam to escape away from you. Using thin metal spatula, gently slide cod and vegetables and any accumulated juices onto plates. Sprinkle with parsley mixture and serve with lemon wedges.

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