Fish in Cascabel-Tomatillo Pipian - Rick Bayless

Ingredients

• 1 pound (5-7 medium) fresh tomatillos,
• 1/2 medium white onion, sliced ½ inch thick
• 2 ounces (about 10 medium) dried cascabel chiles, stemmed and seeded
• 3/4 cup (a scant 4 ounces) pepitas, hulled raw pumpkin seeds
• 1 teaspoon cinnamon, preferably Mexican canela
• 5 black peppercorns, preferably freshly ground
• 3 cloves, preferably freshly ground
• 2 1/2 cups fish broth or water
• 2 tablespoons vegetable oil
• Salt
• 2 pounds boneless, skin-on fish fillets (sea bass, snapper or halibut are good choices), cut into 6 servings