Home-style baked cod with potatoes, tomatoes, and olives is Italian weeknight simplicity. This high protein mediterranean dish is healthy, family-friendly, and perfect for weight loss and dash diets.
Preheat your oven to 400°F (200°C) and lightly oil a large baking dish for even roasting without sticking.
Slice the potatoes 1/4 inch thick to ensure they cook through; scatter them in the baking dish and toss with half the olive oil, half the salt, and pepper.
Top with sliced onions, halved tomatoes, and olives, layering for flavor blend, then sprinkle with oregano.
Nestle cod fillets over the vegetables, drizzle with remaining olive oil, season with remaining salt and pepper, and cover loosely with foil.
Bake covered for 20 minutes to steam the fish gently, then remove foil, increase heat to broil for 6–8 minutes until cod is opaque and flakes easily, and potatoes are golden around edges.
Remove from oven and finish with chopped parsley and minced garlic for fresh aroma, letting rest 3 minutes before serving to retain moisture.