In a sauté pan or a reduction pan (like the chef used in the video) heat the butter and when hot add the onions, when golden brown, add the ham cubes, vinegar, brown sugar, raisins and cream. Cover and cook for about 15 minutes or however long it takes to coo the onions. Cook for a 15 minutes. As the chef explained in the video if you are using jar onions they will only take a few minutes.