Slow Cooker Creamy Salmon and Leek Gratin Tips, FAQ & printable recipe

Tips for success

For a more complex flavor profile, you can gently sauté the leeks in a little butter until soft before adding them to the slow cooker, although this is entirely optional. If you prefer a more pronounced herbal flavor, add a pinch of fresh parsley or chives just before serving.

These additions provide a bright, fresh contrast to the rich cream sauce, elevating the dish's presentation and flavor without requiring any complicated techniques or extra equipment in your kitchen.

The consistency of the sauce can be adjusted according to your preference. If you find the sauce is too thin after cooking, you can remove the salmon pieces and whisk a small amount of cornstarch slurry into the cream, then heat it on high for a few minutes until thickened. However, the natural reduction of the cream during the long, slow cooking process usually results in a perfect, velvety texture that coats the back of a spoon beautifully.

Variations

• Lemon Herb Gratin: Add the zest of one lemon and a tablespoon of fresh lemon juice before cooking. The acidity cuts through the richness of the cream and enhances the flavor of the salmon beautifully.
• Garlic Leek Gratin: Incorporate two cloves of minced garlic along with the leeks. The garlic adds a savory depth that pairs wonderfully with the sweetness of the leeks and the creamy sauce.

Storage and make-ahead

Fridge

Store in an airtight container in the refrigerator for up to 3 days.

Reheat

Gently reheat on the stovetop over low heat or in the microwave at 50% power until warmed through, being careful not to boil the cream sauce.

If you have leftovers, allow them to cool to room temperature for no more than two hours before transferring them to an airtight container. Keep the dish in the refrigerator for up to three days.

When reheating, do so gently over low heat on the stovetop or in the microwave at a lower power setting to prevent the cream sauce from breaking or the salmon from becoming tough. It is best to consume leftovers as soon as possible for the best flavor and texture.

This recipe is excellent for preparing in advance. You can assemble the raw ingredients in the slow cooker insert, cover it, and keep it in the refrigerator for up to four hours before you plan to cook it. Simply remove it from the fridge and start the cooking process according to the instructions. This makes it an ideal option for dinner parties or busy days when you want to get the prep done early and have a hot meal ready by dinnertime.

Serving ideas

Serve this gratin immediately while it is hot, ideally in shallow bowls to showcase the creamy sauce. It pairs beautifully with a side of steamed asparagus, roasted green beans, or a crisp green salad with a light vinaigrette to balance the richness of the cream.

A piece of crusty sourdough bread is also a fantastic addition, perfect for soaking up the remaining sauce at the bottom of the bowl. The simplicity of the dish allows it to be served as an elegant main course.

Consider serving the gratin with a side of steamed baby potatoes or a light, fluffy quinoa to soak up the sauce. Because the dish is already quite rich, keep the accompanying sides relatively simple and fresh.

If you are entertaining, a glass of chilled white wine, such as a Sauvignon Blanc or an un-oaked Chardonnay, will complement the flavors of the salmon and leeks perfectly. The goal is to let the delicate, creamy nature of the main dish shine through.

Frequently asked questions

Recipe card

Slow Cooker Creamy Salmon and Leek Gratin

Prep 10 minCook 3 hRest 5 minTotal 3 h 15 minServes 4

Ingredients

• 1 lb fresh salmon fillets, diced
• 2 cups leeks, thinly sliced
• 1 tsp dried dill
• 1 cup heavy cream

Instructions

1. Place the diced salmon pieces into the bottom of the slow cooker, spreading them out in an even layer to ensure consistent heat distribution during the cooking process.
2. Distribute the thinly sliced leeks evenly over the salmon. Sprinkle the dried dill over the top, making sure to cover the leeks to infuse the flavor throughout the dish.
3. Pour the heavy cream over the salmon, leeks, and dill. Cover the slow cooker and cook on low for 3 hours, or until the salmon reaches an internal temperature of 145°F (63°C). Let the dish rest for 5 minutes before serving.

Contains: fish, milk

Estimated nutrition per serving

Calories

420

Protein

28.5 g

Carbohydrates

8.2 g

Fat

31.4 g

Fiber

1.2 g

Sugar

3.5 g

Sodium

180 mg

Automatic estimate from the ingredient list, not laboratory-verified.