In a mixing bowl, combine the olive oil, lemon juice, minced garlic, chopped parsley, salt, and black pepper. Mix well. Add the fish fillets to the marinade, ensuring they are well coated. Cover the bowl with plastic wrap and let it marinate in the refrigerator for at least 30 minutes.

Vegetable Preparation

Prepare the Vegetables

While the fish marinates, slice the bell peppers, zucchini, red onion, and halve the cherry tomatoes. Set aside.

Cooking

Cook the Fish

Preheat your grill or a grill pan over medium-high heat. Remove the fish from the marinade and place it on the grill. Cook for about 4-5 minutes on each side, or until the fish flakes easily with a fork.

Sauté the Vegetables

In a separate skillet, add a drizzle of olive oil and heat over medium heat. Add the sliced bell peppers, zucchini, red onion, and cherry tomatoes. Sauté for about 5-7 minutes or until the vegetables are tender but still crisp.

Serving

Plate and Serve

Once the fish is cooked, remove it from the grill and let it rest for a couple of minutes. Serve the fish on a plate with the sautéed vegetables on the side. Garnish with lemon wedges and fresh parsley.