Pat cod fillets dry with a paper towel and season generously with salt and black pepper.Heat oil in a large skillet over medium heat. Once hot, add bell pepper and shallots; cook 3 to 4 minutes, until soft. Add garlic, ginger, and red curry paste; stir to combine. Cook 2 minutes, until aromatic, and season with ¼ tsp. salt.
Add coconut milk and fish sauce; bring mixture to a simmer. Nestle seasoned cod fillets in skillet, cover, and reduce heat to medium-low. Gently simmer for 10 to 12 minutes, until the cod is cooked through and easily flakes with a fork. Remove from heat and add fresh lime juice. Garnish with green onion and cilantro, and serve over rice or rice noodles.
