You'll love this simple baked halibut recipe with colorful vegetables tossed in a citrus and olive oil sauce! Perfect for busy weeknights because it comes together in 20 minutes or less. If you can't find halibut, another white fish like cod, haddock, or red snapper would work well. This sheet pan dinner is a filling meal in one, but if you want to make the most of the zesty Mediterranean-style sauce, serve the halibut and veggies over a bed of barley or bulgur.
In a large mixing bowl, whisk the sauce ingredients together. Add the green beans, tomatoes, and onions and toss to coat with the sauce. With a large slotted spoon or spatula, transfer the vegetables to a large baking sheet (21 x 15 x 1 inch baking sheet, for example). Keep the vegetables to one side or one half of the baking sheet and make sure they are spread out in one layer.
Now, add the halibut fillet strips to the remaining sauce, toss to coat. Transfer the halibut fillet to the baking sheet next to the vegetables and pour any remaining sauce on top.
Lightly sprinkle the halibut and vegetables with a little more seasoned salt.
Bake in 425 degrees F heated oven for 15 minutes. Then transfer the baking sheet to the top oven rack and broil for another 3 minutes or so, watching carefully. The cherry tomatoes should begin to pop under the broiler.
When ready, remove the baked halibut and vegetables from the oven. Serve immediately.
Tips for moist, never dry white fish: Cooked fish has an internal temp of 145 degrees F, but this can sometimes cause fish to become dry and overcooked. I remove my halibut from the oven around 135 degrees F and let it sit for a few minutes. It will continue to cook a little as it rests. The flesh of the fish will also turn from translucent to opaque as it cooks.
Halibut substitutes: Try another white fish like cod, sea bass, haddock, or even red snapper fillets. You may have to adjust the cooking time depending on the thickness of the fish fillet.
Serving suggestions: This sheet pan fish recipe is filling by itself, but a bed of barley or bulgur to soak up the sauce wouldn't hurt!
Leftovers and storage: You can store leftovers in tight-lid glass containers in the fridge for 2 days. Personally, I prefer to eat leftover fish at room temperature, but if you want, you can heat it in a skillet over medium-low heat just until warmed through (add a little bit of liquid and cover briefly).