Heat a large saute pan on medium low heat. Add 2 tbs butter and melt. Add the sliced onions and the seasonings. Caramelize the onions slowly. If they brown too much too quickly, turn the heat down. This could take 30 to 40 minutes. 5 minutes before they are done, add vinegar and deglaze the pan. Cook till all liquid reduces into a thick sauce.

Meanwhile, fry eggs in another pan. I fried them to over medium. Set aside.

In the same pan as the eggs, fry the burger patties. I made 1/3 lb patties. Season both sides with salt pepper and garlic powder while cooking.