- 2 tablespoons olive oil
- 2 shallots, chopped
- 3 garlic cloves, finely chopped
- 2 serrano chiles, thinly sliced, divided
- 8 medium tomatillos (about 1 1/4 pounds), husks removed, rinsed
- Kosher salt, freshly ground pepper
- 1 cup cilantro leaves with tender stems, plus more for serving
- 1 pound cod fillet
- 1 (15-ounce) can white hominy, rinsed
- 1 (8-ounce) bottle clam juice
- 3 small radishes, trimmed, thinly sliced
- Lime wedges (for serving)
- Heat oil in a large pot over medium. Cook shallots, garlic, and half of chiles, stirring occasionally, until soft and fragrant, 6–8 minutes.
- Meanwhile, purée tomatillos in a blender until smooth.
- Add half of tomatillo purée to pot and cook, stirring often, until thickened, about 5 minutes. Season with salt and pepper. Add 1 cup cilantro to remaining purée in blender and blend until smooth; set aside.
- Add cod, hominy, clam juice, and 1 cup water to pot. Bring to a simmer and gently cook over medium-low until cod is opaque throughout and beginning to flake, 8–10 minutes. Remove from heat. Stir in reserved raw tomatillo-cilantro purée, breaking cod into large chunks; season with salt and pepper.
- Divide stew among bowls and top with radishes, cilantro, and remaining chile. Serve with lime wedges.