Arctic char, related to salmon and trout, is sustainably farmed, making it a "best choice" for the environment. It has a mild flavor and cooks up quickly. We like the taste and texture of Lacinato (a.k.a. Dinosaur) kale in this dish. Serve with mashed potatoes.
- Heat oil in a large skillet over medium heat. Cook shallot, stirring, until beginning to soften, about 2 minutes. Add broth, water and half the kale; cook, stirring, until slightly wilted, about 1 minute. Add the remaining kale and cook until tender, about 8 minutes.
- Sprinkle fish with salt and pepper and place on the kale. Cover and cook until the fish is just cooked through, 5 to 7 minutes.
- Meanwhile, combine sour cream, horseradish and dill in a bowl. Serve the fish and kale with the sauce and lemon wedges.