In a large bowl blend together all ingredients except onions and breadcrumbs. Set aside for later.
In a pan melt butter and saute onions until cooked and translucent. When cooked, add onions to bowl of ground chicken. Mix together.
Place breadcrumbs in a shallow medium size dish. Spoon meat mixture into hand and shape into any size nuggets. Place nugget patty in breadcrumbs on both sides and set aside on separate plate. Do this until all nuggets are made.
Heat up oil in a large frying pan on medium heat. When ready, lightly fry nuggets until golden brown on both sides; about 2-3 minutes on each side.