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Slow-Roasted Salmon with Dill Horseradish Sauce

Slow-Roasted Salmon with Dill Horseradish Sauce is an easy recipe that makes an incredibly tasty main course for a Paleo, Whole30, and Keto meal.

Overhead shot of slow-roasted salmon covered with dill horseradish sauce on a black sheet pan.

There are about 1,347 different ways to prepare salmon, but slow-roasting is an simple, stress-free technique that ensures that it will be perfectly cooked.

(If you’ve ever broken into a cold sweat at the thought of making fish, this is the method for you).

When this tender, melt-in-your-mouth salmon is paired with a creamy, dairy-free horseradish sauce loaded with fresh dill, good things happen.

Angled shot of slow roasted salmon with dill horseradish sauce on a baking sheet

What you’ll need for this recipe are the following ingredients:

  • one whole salmon fillet (about 3 pounds)
  • extra virgin olive oil
  • fresh horseradish root
  • your favorite Whole30/Keto compliant mayonnaise
  • distilled white vinegar
  • fresh dill
  • sea salt and black pepper

Why Should You Slow-Roast Salmon?

As I previously stated, slow-roasting salmon (or any fish for that matter) is an easy way to cook it to perfection.

By roasting it at a low oven temperature, you are basically guaranteeing that the fish retains moisture and preventing it from drying out due to overcooking.

Close up of slow roasted salmon with dill horseradish sauce on a plate with asparagus.

It really is an almost fool-proof technique that leaves plenty of wiggle room as far as the cooking time goes.

I prefer to use a whole, skinless salmon fillet for this method because a large, thick piece of fish seems to benefit most from the slow-roasting process.

Overhead shot of a whole salmon fillet on a white cutting board.

Also, if my salmon has skin, I prefer that it be crispy. Slow-roasting will definitely not produce this.

You can absolutely use a skin-on filet though. Smaller, individual fillets will also work for this method, just shorten the cooking time accordingly.

How to Make Slow-Roasted Salmon

Start by preheating your oven to 275° F.

Place the salmon skinned-side down on a parchment-lined baking sheet.

Rub some olive oil all over the fillet, then liberally season with salt and pepper.

Overhead shot of a seasoned salmon fillet on parchment paper

Transfer the baking sheet to the oven and roast it for about 30 minutes.

Cooking time will vary depending on the thickness of your salmon, but once it easily flakes apart with a fork, it’s done.

Shot of a salmon fillet on a baking sheet being roasted in the oven.

If you are a nerd like me, you can break out the kitchen thermometer. I like to shoot for a final internal temperature of 120°-125°F (note that the USDA recommends 145°F though).

How to Make Dairy-Free Horseradish Sauce

While the salmon is roasting, you can take the opportunity to make a quick and delish dairy-free Paleo horseradish sauce.

Close up of a fresh horseradish root with fresh dill on a wooden cutting board.

Simply peel the woody skin and some of the tougher inner peel off the horseradish root (a vegetable peeler works great for this).

Overhead shot of a peeled horseradish root with a vegetable peeler on a wooden cutting board.

Finely grate the peeled horseradish root. You’ll need about 1/4 cup for the sauce.

Close up of a hand grating horseradish root on a metal grater.

Combine the grated horseradish, mayonnaise, fresh dill, and vinegar together in a small bowl and mix well. Season the sauce with a little sea salt and black pepper to taste.

Over head shot of grated horseradish, fresh dill, vinegar, mayonnaise in a metal mixing bowl.

Serve the salmon with the horseradish sauce on top.

Overhead shot of slow roasted salmon with dill horseradish sauce with asparagus and lemons on a black plate.

Some pan fried asparagus makes a great accompaniment to complete this a full meal. Enjoy!

More Tasty Paleo, Whole30, and Keto Salmon Recipes:

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5 from 1 vote

Slow-Roasted Salmon with Dill Horseradish Sauce

This easy Slow-Roasted Salmon recipe with a dairy-free Dill Horseradish Sauce makes a tasty main course for a Paleo, Whole30, and Keto meal.
Course Main Course
Cuisine gluten-free, Keto, Paleo, Whole30
Keyword dill, horseradish, salmon
Cook Time 30 minutes
Total Time 35 minutes
Servings 4

Ingredients

  • 1 (3 pound) whole salmon fillet pin bones removed
  • 1 tablespoon extra virgin olive oil
  • sea salt to taste
  • freshly ground black pepper to taste

For the Dill Horseradish Sauce

  • 1/2 cup mayonnaise homemade or Whole30/Keto compliant
  • 1/4 cup fresh horseradish root finely grated
  • 1/4 cup fresh dill chopped
  • 1 tablespoon distilled white vinegar
  • sea salt to taste
  • freshly ground black pepper to taste

Instructions

  • Preheat the oven to 275°F.
  • Place the salmon skinned-side down on a baking sheet lined with parchment paper. Rub the fillet with olive oil and liberally season with salt and pepper.
  • Transfer the salmon to the oven and roast for about 30 minutes until the salmon is cooked through and flakes easily with a fork. Serve with dill horseradish sauce.

For the Dill Horseradish Sauce

  • Combine the mayonnaise, grated horseradish, dill, and vinegar together in a small mixing bowl. Season with seas salt and black pepper to taste.
  • Store the sauce in the refrigerator until ready to serve.
Tried this recipe?Mention @sophisticatedcaveman or tag #sophisticatedcaveman on Instagram!

Equipment

Baking Sheet
Mixing Bowl

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