In a small bowl, combine the minced garlic, ground ginger, sweet paprika, ground cumin, turmeric, salt, and black pepper. Stir in the 3 tablespoons of extra-virgin olive oil along with the bloomed saffron threads and their soaking water. Whisk until a smooth, fragrant paste forms.

Pat the white fish fillets completely dry on all sides using paper towels. Place them in a shallow dish, coat thoroughly with the chermoula marinade, and let rest at room temperature for 15 to 20 minutes.

Preheat your oven to 400°F (200°C). In a deep baking dish or large oven-safe skillet, layer the sliced onions and carrots along the bottom. Top them with the sliced bell peppers and tomato rounds. Drizzle with a tiny splash of olive oil, season with a pinch of salt, and bake for 15 minutes until the vegetables begin to sweat and soften.

Carefully remove the hot baking dish from the oven. Arrange the marinated fish fillets right on top of the softened vegetable bed. Pour any remaining marinade from the dish over the fish. Scatter the green olives evenly around the pan. Return to the oven uncovered and bake for 20 to 25 minutes, or until the fish reaches an internal temperature of 145°F (63°C) and flakes effortlessly with a fork.

Remove from the oven, let rest for 3 minutes, then shower with the freshly chopped parsley. Serve hot alongside your favorite crusty bread, rice, or fluffy couscous.