Photo of One-Skillet Tarragon-Braised Leeks with Alaskan Halibut by WW

One-Skillet Tarragon-Braised Leeks with Alaskan Halibut

Points® value
Total Time
55 min
25 min
30 min
Here’s a super-simple fish dish that truly celebrates leeks. If you've never cooked with leeks before, this recipe is definitely the one you should try. They taste similar to green onions when cooked down but are a bit milder and a touch sweeter. Just make sure you rinse your leeks well after you chop them–soil tends to get trapped deep within them. Cooking them while they're still wet results in a melty, very tender texture that nicely complements the halibut, tarragon, and lemon.


Uncooked leek

6 large, (about 3 lb)

Unsalted butter

2 tbsp(s)

Kosher salt

½ tsp(s), divided, or to taste

Black pepper

¼ tsp(s), freshly ground, divided, or to taste

Fresh tarragon

6 sprig(s), leaves only, chopped (plus more for garnish)

Uncooked halibut fillet

1½ pound(s), skinless (four 6 oz pieces)

Cooking spray

4 spray(s)


½ medium, sliced into 4 very thin pieecs


  1. Using a chef's knife, trim off dark green leek tops; trim bottoms just above roots. Split leeks in half lengthwise; thinly slice into half circles. Place sliced leeks in a large bowl of cold water; swish leeks around and use your fingers to separate half circles from one another where any soil might hide (as you swish, soil will fall to the bottom). Using your hands, transfer cleaned leeks from water to a second bowl; repeat as needed until no more soil remains.
  2. Preheat oven to 350°F.
  3. Heat butter in a large round ovenproof casserole dish (about 6-7 qt, or in an 11- to 12-in skillet) over medium heat. Add still damp leeks; season with 1/4 tsp salt and 1/8 tsp pepper. Cover and cook, stirring occasionally, until leeks are melted and tender, about 15 minutes; remove from heat. Add tarragon; stir to combine.
  4. Season fish with 1/4 tsp salt and 1/8 tsp pepper on both sides; arrange fillets on top of leeks and lightly coat fillets with cooking spray. Top each fillet with a thin slice of lemon; transfer to oven. Cook until fish is firm and cooked through, about 12-18 minutes (depends on thickness). Garnish with additional tarragon; serve immediately.
  5. Serving size: 1 piece fish and 1 cup leek mixture