Baked grouper with tomatoes and olives is a hearty mediterranean fish dinner. This high protein dish is fresh, healthy, and ideal for a family dinner on a dash diet or weight loss plan.
Preheat your oven to 400°F (200°C) and lightly grease a large baking dish with olive oil.
Scatter sliced red onion and halved cherry tomatoes evenly at the bottom of the dish for a flavorful vegetable base.
Arrange the grouper fillets on top of the vegetables in a single layer, patting them dry for even roasting.
Drizzle olive oil over the fish and generously season with salt, black pepper, and dried oregano; sprinkle chopped kalamata olives and a squeeze of fresh lemon juice over everything.
Bake uncovered for 20–25 minutes, depending on fillet thickness, until the fish flakes easily (internal temperature should reach 140°F), then garnish with parsley before serving.