One Pan Baked Halibut Recipe With Vegetables: Flaky Fish and Roasted Veggies in One Sheet

Dinner doesn’t get simpler—or more impressive—than this sheet pan approach. I’ve tested countless methods, and baking halibut with vegetables together delivers flaky, tender fish alongside caramelized produce without extra effort.

One pan means less cleanup and more flavor. The halibut cooks gently while the vegetables roast, absorbing the same herbs and citrus that brighten the fish. It’s the kind of meal that feels special but comes together in under 30 minutes.

What you’ll love most is how the fish stays moist and the veggies turn golden, all with hands-off time. The secret is high heat and precise timing—no flipping, no fuss.

Serve straight from the pan for a dish that’s as practical as it is delicious.

Ingredients for One Pan Baked Halibut Recipe with Vegetables

One sheet pan, fresh halibut, roasted veggies, and a handful of herbs for brightness.

Halibut quality is everything here. Look for firm, translucent fillets at Whole Foods or a trusted fishmonger—avoid anything with a fishy smell (that means it’s old). Baby potatoes from Trader Joe’s are perfect (small, waxy, hold their shape). The asparagus should be thick—those pencil-thin spears shrink to nothing. Fresh dill and parsley are non-negotiable; dried just won’t cut it for this dish (the flavor’s too muted).

No halibut? Cod or mahi-mahi work nearly as well. Swap potatoes for sweet potatoes (cut smaller—they cook faster). Short on herbs? Use half the amount of dried, but add them earlier so they rehydrate. No fresh lemon? Bottled juice in a pinch, but skip the zest. The Dijon mustard can be whole-grain or regular, but avoid the sweet stuff—it’ll clash with the citrus.

Prep the veggies first (they take longer). Halibut stays fresh in the fridge for 1-2 days max—cook it the day you buy if possible. Leftovers? 2-3 days in the fridge, but the fish is best eaten fresh. Reheat gently in a 300°F oven to keep it from drying out.

Step-by-Step Instructions for One Pan Baked Halibut With Vegetables

Here’s the foolproof method for tender halibut and perfectly roasted vegetables on a single sheet.

Step 1: Prep the Vegetables and Halibut

Preheat your oven to 400°F. Toss the 1 lb Baby Potatoes (halved or quartered), 1 bunch Asparagus Spears (trimmed), and 1 whole Red Bell Pepper (sliced into strips) with 2 tablespoons of the ¼ cup Extra-Virgin Olive Oil, ½ tsp Ground Black Pepper, and ½ tsp Paprika.

Spread them in an even layer on a large baking sheet. Pat the 1.5 lb Halibut Fillets dry and place them on one side of the pan, leaving space for the vegetables. This ensures everything roasts evenly without crowding.

Step 2: Season the Halibut and Vegetables

In a small bowl, whisk together the remaining 2 tablespoons Extra-Virgin Olive Oil, the 1 tbsp Dijon Mustard, zest and juice of 1 whole Lemon, 4 cloves Fresh Garlic Cloves (minced), 1 tsp Kosher Salt, and ¼ tsp Red Pepper Flakes.

Brush this mixture generously over the halibut fillets. Sprinkle the vegetables with additional Kosher Salt to taste. The mustard and lemon glaze will create a flavorful crust while keeping the fish moist.

Step 3: Roast Until Flaky and Caramelized

Bake in the preheated oven for 12-15 minutes or until the halibut is opaque and flakes easily with a fork. The vegetables should be tender and lightly caramelized, with the asparagus spears just beginning to crisp at the edges.

If the potatoes need more time to soften, you can give them a 5-minute head start before adding the halibut and remaining vegetables. This ensures everything finishes cooking at the same time.

Step 4: Garnish and Serve

Remove the pan from the oven and sprinkle the ¼ cup Fresh Dill (chopped) and ¼ cup Fresh Parsley (chopped) over the halibut and vegetables. The fresh herbs add a bright, aromatic finish that complements the rich, roasted flavors.

Let the dish rest for 2-3 minutes to allow the juices to redistribute in the halibut. Serve immediately, dividing the fish and vegetables evenly among plates. The halibut should be flaky and tender, with a golden crust from the mustard glaze.

Storing and Reheating This one pan baked halibut recipe with vegetables

Refrigerator Storage

Let your halibut and vegetables cool completely before storing. Transfer to an airtight container and refrigerate at 40°F or below for up to 2 days. The fish stays moist if kept in its juices. ❄️

Freezer Storage

For longer storage, wrap individual portions tightly in plastic wrap then place in a freezer-safe bag. Squeeze out excess air to prevent freezer burn. This method keeps the dish fresh for up to 1 month.

Oven Reheating

Preheat your oven to 300°F and place the halibut and vegetables on a baking sheet. Cover with aluminum foil and heat for 10-15 minutes until warmed through. This gentle method preserves moisture.

Microwave Reheating

Place a portion on a microwave-safe plate and cover with a damp paper towel. Heat on 50% power for 1-2 minutes, checking frequently. Add a splash of water if the fish looks dry.

Pro Tips

I always reheat halibut gently to prevent drying out. If you’re meal prepping, store the vegetables separately—they reheat better than the fish. Fresh herbs lose their vibrancy when stored, so add new ones when reheating. 💡

Frequently Asked Questions