something's fishy

Halibut with Green Salsa

1 tablespoon butter
2 tablespoons flour
3/4 cup coarsely chopped tomatillos
1/2 cup coarsely chopped onion
2 fresh poblano chiles (6 oz. total), stemmed, seeded and coarsely chopped
1/4 cup packed, coarsely chopped fresh cilantro, plus about 2 tbsp. whole leaves
1/2 cup reduced-sodium chicken broth
3/4 cup sour cream, divided
Kosher salt
1 to 2 tbsp. lime juice
1 or 2 boned and skinned halibut or salmon fillets (1 3/4 lbs. total; about 1 in. thick)



Preparation
1. Preheat oven to 375°. In a large frying pan, melt butter over high heat. Stir in flour, remove from heat, and mix to form a smooth paste.

2. Scrape flour paste into a blender. Add tomatillos, onion, chiles, chopped cilantro, chicken broth, and 1/2 cup sour cream. Whirl until smoothly puréed. Pour green sauce back into frying pan; add salt and lime juice to taste.

3. Rinse fish, pat dry with paper towels, cut into 6 equal pieces, and season with salt. Set pieces slightly apart in an 8- by 12-in. baking dish.

4. Bring green sauce to a boil over high heat, stirring. Pour evenly over fish.

5. Bake fish until it flakes but still looks moist in the center of the thickest part (cut to test), 15 to 20 minutes.

6. With a wide spatula, transfer fish to plates. Spoon sauce over portions, top with small spoonfuls of remaining sour cream, and sprinkle with cilantro leaves.


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