Follow these simple steps to create the Savory Grilled Fish with Tangy Caper and Red Onion Sauce:

1. Preheat the Grill: Heat your grill to medium-high temperature, preparing it for cooking the fish.
2. Prepare the Fish: Pat the fish fillets dry with a paper towel. Brush both sides with olive oil and season with salt and black pepper.
3. Grill the Fish: Place the fish fillets on the grill. Cook for about 4-5 minutes on each side or until the fish flakes easily with a fork.
4. Make the Sauce: While the fish is grilling, heat a tablespoon of olive oil in a small saucepan over medium heat.
5. Sauté Onions: Add the sliced red onions and sauté until they start to soften, about 2-3 minutes.
6. Add Capers and Lemon Juice: Stir in the capers and fresh lemon juice, cooking for another minute until heated through.
7. Season the Sauce: Taste the sauce and add additional salt and pepper if necessary.
8. Plate the Dish: Once the fish is beautifully grilled, carefully transfer it to serving plates.
9. Drizzle with Sauce: Spoon the tangy caper and red onion sauce generously over the grilled fish.
10. Garnish and Serve: Sprinkle with chopped parsley and serve with lemon wedges on the side.

These straightforward steps will guide you to an incredible dish that you and your loved ones will surely enjoy!