Embark on a culinary journey to the sun-drenched coasts of Italy with this exquisite Poached Halibut in San Marzano Tomato Sauce with Olives. This recipe offers a refreshingly healthy, yet intensely flavorful, way to enjoy fish, perfectly marrying the delicate texture of halibut with a rich, vibrant sauce crafted from premium San Marzano tomatoes, aromatic onions, savory shallots, a hint of chicken stock, and a medley of Mediterranean herbs and olives. It’s an ideal dish for those seeking a light, nutritious meal that doesn’t compromise on gourmet taste, bringing a touch of coastal Italian warmth to any table, especially welcome during cooler seasons.

Discover the Art of Poaching for Perfectly Cooked Fish
I’ve long advocated for poaching as the ultimate method for preparing fish, and for excellent reason. Not only is it incredibly straightforward, requiring minimal hands-on time, but it consistently delivers fish that is impeccably cooked, moist, and tender. Unlike frying or baking, poaching gently infuses the fish with the flavors of the liquid it’s cooked in, resulting in a depth of taste that’s simply unparalleled. This technique ensures that your halibut, a naturally lean and delicate fish, remains flaky and succulent, absorbing every nuanced flavor from the rich San Marzano tomato sauce.
This particular Poached Halibut in San Marzano Tomato Sauce with Olives recipe showcases the brilliance of poaching. The halibut isn’t just cooked; it’s lovingly bathed in a luscious, aromatic sauce that transforms a simple meal into a memorable dining experience. The sauce itself is a symphony of flavors, built upon the sweet acidity of San Marzano tomatoes, softened onions and shallots, and the savory depth of chicken stock. Seasoned with fragrant herbs de Provence, earthy marjoram, and briny olives, it’s a taste of Italy that feels both comforting and sophisticated, a true winter warmer in a bowl.

From Inspiration to Innovation: Crafting Our Signature Halibut Dish
The genesis of this incredible recipe can be traced back to a period when I found myself yearning for novelty in my fish preparations. My usual routine had grown a bit monotonous, and I was actively seeking a dish that would surprise and delight. It was during this quest that I stumbled upon a Williams-Sonoma recipe for Halibut with Tomatoes, Olives, and Marjoram. Its unique approach instantly captivated me, promising something distinctly different from anything I had ever prepared before. I decided it was well worth a try, and the initial outcome left me utterly astonished.
The sheer deliciousness and remarkable ease of preparation were truly a revelation. The concept was brilliantly simple: create a flavorful sauce, then gently poach the fish within it. This method not only ensured perfectly cooked fish but also allowed the flavors to meld beautifully, elevating the entire dish to an unexpectedly gourmet level. The experience immediately sparked a desire to customize and enhance the recipe, adapting it to my preferred flavor profile and dietary considerations.

My first significant tweak involved swapping out the wine for a combination of rich chicken stock and bright lemon juice. This decision not only ensured the recipe was accessible to more palates but also added a nuanced depth and a refreshing zest that truly complemented the tomatoes. Next, I introduced basil and additional herbs de Provence, knowing instinctively that these aromatic powerhouses would harmonize beautifully with the sweet, acidic notes of the tomatoes. These “spirit spices,” as I affectionately call them, bring an undeniable Mediterranean essence to the dish. Finally, I fine-tuned the ingredient proportions, ensuring a perfect balance of flavors and quantities ideal for a delightful meal for two.
Essential Ingredients for Your Italian Halibut Masterpiece
Crafting this flavorful poached halibut dish requires a careful selection of ingredients, each playing a crucial role in building its rich and authentic Italian profile. Here’s what you’ll need:
- Halibut fillets: Opt for fresh, firm fillets. Halibut’s mild flavor and meaty texture make it perfect for absorbing the sauce’s robust flavors.
- Yellow onion & shallots: These aromatic vegetables form the foundational layer of flavor for the sauce, offering a sweet and savory base when sautéed.
- Red pepper flakes: Just a touch provides a subtle warmth and gentle kick, enhancing the overall complexity without overpowering the delicate fish.
- Chicken stock: Used instead of wine, it adds savory depth and body to the sauce, creating a perfect poaching liquid.
- Fresh lemon juice: A squeeze of lemon brightens the flavors, cutting through the richness of the tomatoes and balancing the savory notes.
- San Marzano tomatoes (canned, with juices): These are the undisputed stars of the sauce. Imported from Italy, San Marzano tomatoes are renowned for their sweet, less acidic flavor and tender flesh, making them ideal for a superior tomato sauce.
- Fresh basil & dried marjoram: Essential Italian herbs that lend their distinctive, aromatic, and slightly peppery notes to the sauce, marrying beautifully with the tomatoes and olives.
- Herbs de Provence: This classic French blend, featuring herbs like savory, marjoram, rosemary, thyme, and oregano, adds an enchanting floral and earthy complexity, evoking the landscapes of the Mediterranean.
- Kalamata olives (pitted and quartered): These briny, salty olives provide a wonderful counterpoint to the sweetness of the tomatoes, adding an authentic Mediterranean touch and a delightful texture.
- Salt and freshly ground black pepper: Essential for seasoning, bringing all the flavors into harmony.

A Culinary Revelation: The Final Dish
The culmination of these thoughtful adaptations and carefully selected ingredients is this Poached Halibut in San Marzano Tomato Sauce with Olives recipe. It has quickly ascended to the top of my list of favorite fish dishes, and for very good reason. Each bite is a testament to the power of fresh, quality ingredients and a simple, effective cooking method. The tomato sauce, sweet and robust from the authentic San Marzano tomatoes, boasts layers of flavor thanks to the beautifully roasted onions and the generous inclusion of basil and herbs de Provence. These herbs, which I fondly refer to as my “spirit spices,” truly sing when combined with the rich tomato base.
The salty burst of the Kalamata olives provides a perfect textural and flavor contrast, instantly transporting me to the sun-drenched landscapes of Provence and the rustic charm of Italy. Indeed, the imported San Marzano tomatoes are a game-changer, their unparalleled sweetness and quality reminding me vividly of true Italian cuisine – a flavor I’m committed to incorporating into many more sauces to come. Beyond its exquisite taste, this recipe is a fantastic way to effortlessly incorporate beneficial omega-3 fatty acids from the halibut into your diet, making it a meal that is as nourishing as it is delicious. It’s truly a dreamy dish, marrying health and indulgence in every spoonful.

Expand Your Seafood Repertoire
If you’re eager to explore more delightful fish recipes that are both healthy and packed with flavor, here are a few other favorites you might enjoy:
- Dairy-free Pan Seared Salmon in Cream Sauce (Paleo, Whole30)
- Foil Packet Lemon Rosemary Halibut (GF, Grain-free)
Poached Halibut in San Marzano Tomato Sauce with Olives (Paleo, GF)
Dominique
2
10 mins
27 mins
37 mins

Ingredients
- 2 tsp olive oil
- a scant 1 cup of diced yellow onion, (this was one onion for me)
- 1/4 cup diced shallots, (this was 2 medium shallots for me)
- 1/8 tsp red pepper flakes
- 1 cup chicken stock
- 3 Tbs lemon juice
- one (28 oz can) San Marzano tomatoes, (with juices)
- ¼ tsp salt
- ¼ tsp ground black pepper
- 1 tsp basil
- 1 tsp herbs de provence, , divided
- 1 lb halibut, , cut into 1 1/2-inch pieces
- 1/2 cup of pitted kalamata olives that have been quartered lengthwise
- 1 tsp dried marjoram
Instructions
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Add 2 tsp of olive oil to a large sauté pan. Add the diced onion, diced shallots, and red pepper flakes to the pan and sauté over medium-high heat, while mixing often, until tender, about 6 minutes. Add the chicken stock and lemon juice and boil about 5 minutes. Add the Marzano tomatoes with their juices, and top with 1 tsp dried basil, ½ tsp herbs de Provence, and salt and pepper to taste. Reduce the stovetop heat to medium and simmer for 10 minutes. Make sure to push down on the tomatoes until they break up.
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Season the fish with ¼ tsp salt, ¼ tsp black pepper, and ½ tsp herbs de Provence. Add the fish to the pan and cover each piece in the sauce. Cover the pan and simmer until the fish is almost cooked through, about 4 minutes. Flip each fish piece over, add the olives and marjoram to the pan, mix, and let everything simmer until the fish is cooked all the way through, about 2 minutes.
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Remove the fish from the sauce, remove the skin (it should be easy to remove once the fish is cooked through), and then put the fish back into sauce prior to serving.
Notes
Nutrition
Carbohydrates: 20g
Protein: 47g
Fat: 14g
Saturated Fat: 2g
Polyunsaturated Fat: 2g
Monounsaturated Fat: 9g
Cholesterol: 115mg
Sodium: 1152mg
Potassium: 1376mg
Fiber: 4g
Sugar: 8g
Vitamin A: 356IU
Vitamin C: 18mg
Calcium: 80mg
Iron: 2mg
Nutrition information is automatically calculated, so should only be used as an approximation.
Additional Info
Main Course
Mediterranean
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