Step 1Pat the salmon fillets dry to remove all excess moisture.
Step 2Make a dill spread: In a bowl, whisk together the mayonnaise, dill, a generous ½ teaspoon salt, or to taste, and several grinds of black pepper. Brush the spread over the salmon fillets on all sides.
Step 3Heat a grill over medium-high heat until hot. Place the fillets flesh-side down on the grill. Grill for about 6 minutes on one side, rotating partway through for good grill marks. Flip the fish over and continue grilling, skin-side down until the fish is cooked to desired doneness, about 6 minutes more.
Step 4Remove to a platter and serve garnished with lemon wedges.