In a large bowl combine chicken, chopped garlic, onion (large slices) and salt. Toss and refrigerate for at least 20 min to an hour.
Preheat oven to 360 degrees.
Pat chicken dry, lightly coat in mayo then cover both sides in bread crumbs, lightly shake off any excess then place into baking dish.
Bake for 40min to 1 hour or until chicken is fully cooked and breadcrumbs are golden brown.
Serve with vegetable or rice.