In a mini food processor, or using a mortar and pestle mash garlic with the herbs, vinegar, oil, and Dijon mustard until it becomes a paste. Set aside.
Season salmon with a pinch of salt and fresh pepper. Heat a grill or grill pan over high heat until hot. Spray the pan lightly with oil and reduce the heat to medium-low. Place the salmon on the hot grill pan and cook without moving for 5 minutes.
Turn and cook the other side for an additional 3-4 minutes spooning on half of the garlic herb mustard sauce.
Turn and cook 1 more minute spooning the other side of the fish with remaining sauce. Turn once again and let the fish finish cooking about one more minute.
**Note: the fish should have a total cooking time of about 9-10 minutes per inch. If your fish is thinner, reduce the total cooking time.
Transfer the fillets to plates and serve with fresh lemon wedges.