Ingredients
2 lemons
1 tablespoon olive oil
1 medium red onion, halved and thinly sliced
2 garlic cloves, thinly sliced
2 heads escarole (2 pounds total), cored, trimmed, and coarsely chopped
4 boneless, skinless cod fillets (6 ounces each)
Coarse salt and ground pepper
Preparation
Thinly slice off both ends of one lemon. Cut into 8 thin slices. From remaining lemon, squeeze 1 to 2 tablespoons juice into a bowl.
In a 5-quart Dutch oven or heavy pot, heat oil over medium-high. Cook onion and garlic, stirring occasionally, until golden brown, 6 to 8 minutes.
Stir in escarole and 1/2 cup water. Arrange cod on top; season with salt and pepper. Place two lemon slices on each fillet. Cover, and cook until cod is opaque throughout, 12 to 14 minutes.
Transfer cod to a plate. Stir lemon juice into escarole mixture. Serve cod with escarole.