Start by preparing the fish: Rinse the salmon fillets and pat them dry with paper towels. If desired, remove the skin from the fillets.
Prepare the marinade: In a bowl, mix together olive oil, lemon juice, herbs, spices, sweetener, salt, and pepper.
Marinate the fish: Place the salmon in a shallow dish and pour the marinade over the fish, making sure that it is well coated. Cover and refrigerate for at least 30 minutes, but not more than 2 hours.
Prepare the grill: Preheat your grill to medium-high heat (about 375-400°F). Clean the grates with a wire brush and oil them with vegetable oil to prevent the fish from sticking.
Place the fish on the grill: Carefully place the marinated salmon fillets on the grill, skin-side down if they have skin. Discard the remaining marinade.
Grill the fish: Grill the salmon for 4-6 minutes per side, or until the fish is cooked through and the flesh is opaque. Use a fish spatula to gently flip the fish during cooking.
Remove the fish from the grill: Carefully remove the fish from the grill and let it rest for a few minutes before serving.
Serve and enjoy: Serve the grilled salmon with your desired sides and garnish with fresh herbs or lemon wedges.
It's always best to check the fish for doneness and keep in mind that the cooking time will depend on the thickness of the fish and the temperature of the grill.