Caper Butter Halibut with Roasted Asparagus & Baby Potatoes

Halibut is high in protein and cooks quickly in parchment paper, making this an ideal clean dinner recipe for busy weeknights.

Capers are little flavor bombs, but they can be very salty – give them a quick rinse to remove some of the salt before mincing and stirring into the herbed butter. The trick to roasting the fish, potatoes and asparagus together on the same baking sheet is creating separate “bowls” of parchment paper for each – this way, each component of the meal keeps to itself without spilling onto the others. To make the parchment bowls, simply cut three sheets of parchment and fold up the edges to create rimmed sides.

Prep Time
25 min
Cook Time
15 min
40 min


  • 12 baby white or red potatoes (about 1 lb), scrubbed and halved
  • 4 tsp olive oil, divided
  • 1/2 tsp each sea salt and ground black pepper, divided
  • 1 lb asparagus, trimmed
  • 1 tbsp balsamic vinegar
  • 2 tbsp organic unsalted butter, softened (TRY: Horizon Organic Unsalted Butter)
  • 2 tbsp chopped fresh flat-leaf parsley
  • 1 tbsp capers, drained, rinsed and minced
  • 1 tsp lemon zest + additional for garnish
  • 4 5-oz skinless halibut fillets (or cod or haddock)


  1. Preheat oven to 375°F. Cut three 15-inch lengths of parchment paper and arrange in a single layer on an 18 x 12-inch rimmed baking sheet. Fold and crumple all 4 edges of each sheet to make 2-inch-tall rimmed sides resembling shallow bowls (alternatively, you can use foil to create 3 shallow “bowls”).
  2. In a large bowl, toss together potatoes, 2 tsp oil and 1/8 tsp each salt and pepper. Arrange potatoes, cut sides down, in a single layer on 1 outer bowl of parchment. Bake for 15 minutes.
  3. Meanwhile, in same large bowl, toss together asparagus, vinegar, remaining 2 tsp oil and 1/8 tsp each salt and pepper.
  4. In a small bowl, stir together butter, parsley, capers and lemon zest. Sprinkle fish with remaining 1/4 tsp each salt and pepper. Spread butter mixture over fish.
  5. Remove sheet from oven; add fish to center bowl of parchment. Add asparagus to remaining outer bowl of parchment. Return to oven; bake until fish flakes easily when tested with a fork, asparagus is tender and potatoes are golden, 10 to 12 minutes more. Divide among plates. Drizzle fish with any butter mixture left in parchment and garnish with additional lemon zest.

Related: Green Curry Poached Halibut

Halibut Perks: A highly nutritious choice for your clean-eating lifestyle, halibut is an excellent source of omega-3 fatty acids – which benefit both the brain and heart – as well as muscle-building protein, energy-enhancing vitamin B12 and thyroid-supportive selenium.

Nutrition Information

  • Serving Size 1 fillet and 1/4 of vegetables
  • Calories 331
  • Carbohydrate Content 23.5 g
  • Cholesterol Content 85 mg
  • Fat Content 12 g
  • Fiber Content 3 g
  • Protein Content 31 g
  • Saturated Fat Content 5 g
  • Sodium Content 404 mg
  • Sugar Content 1 g
  • Monounsaturated Fat Content 6 g
  • Polyunsaturated Fat Content 1 g