Place chicken wings in a large nonreactive bowl or roasting pan.
In a small bowl, add garlic, rosemary, parsley, lemon juice and black pepper. Whisk to mix well.
Season with salt, to taste.
Pour marinade mixture over wings, tossing to coat.
Place in a tightly covered container, in the refrigerator, for 24 hours. Stir occasionally. Do not over-marinate.
Preheat oven to 475°F.
Remove wings from marinade allowing excess to drip off (Discard marinade).
Place wings in a baking dish, single layer, skin side up.
Place dish in preheated oven and cook for 25 minutes, turning wings over halfway through cooking process to brown both sides.
Place on a single serving platter or several individual serving plates.
Top with caramelized onions.
Serve with focaccia bread wedges.