Melt half the butter in a frying pan and cook the onion until softened, stirring occasionally, about 10 minutes. Place the cooked onion, ground sirloin and parsley in a mixing bowl. Season with salt and pepper and mix well. Form into 6 equal-size burgers. Melt the remaining butter in the frying pan and brown the hamburgers on both sides. Drain and keep warm. Preheat the oven to 475 F. Place a piece of ham on 6 of the pieces of toast. Place a 1/2- inch slice of tomato on each piece of ham. Top with a burger and a slice of cheese. Bake for 5 minutes.
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2 lbs ground sirloin
3 slices ham, cut in half
12 slices white bread, toasted
2 beefsteak tomatoes
6 slices Emmenthal or Swiss cheese
1 large onion, chopped
1/4 cup chopped fresh parsley
2 tbsp unsalted butter
salt, pepper
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10
mn
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15
mn
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Be careful not to overcook the steaks in the frying pan as they will continue cooking in the oven.
