This works really well -Slice a large onion in 1/2 inch wedges. Pick the largest outer rings of the onion and set aside the rest of the onion in a zip-lock bag to use for a later time. Put spray/oil/butter in pan and melt. Place the onion ring down in pan so that the widest part is facing up. Crack and drop egg into ring. Let cook until ready to flip (if that is your desired way to have your egg and then flip. If you want no runny egg once flipped poke the egg yolk and let cook and then flip again and cook to get desired egg type. You can also oil a baking pan – place onion slices down into pan and crack open eggs and place withing onion edges. Bake 350 for five to 8 minutes until desired egg type is achieved.