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8 ounces fresh mushrooms, sliced
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2 tablespoons vermouth
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1/4 cup unsalted butter
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1/2 teaspoon garlic salt
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1 pound ground round beef
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1 green bell pepper, seeded and diced
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1 small white onion, diced
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1/4 cup half-and-half
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salt
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freshly ground pepper
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4 slices cheese, (provolone, Jarlsberg, Swiss, or Brie)
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4 English muffins, split and toasted
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Dijon mustard
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