"Salisbury Steak Burgers with Gravy SUPER GOOD and amazing! This is the best and easy recipe for salisbury steak made into sandwiches with a gravy recipe..."
INGREDIENTS
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1 pound ground beef
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1/4 cup breadcrumbs
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1 large egg
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2 teaspoons Worcestershire sauce
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1 teaspoon onion powder
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1/2 teaspoon garlic salt
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1/2 teaspoon mustard powder
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1/4 teaspoon kosher salt
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lots fresh ground black pepper (, or to taste)
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1 Tablespoon cooking oil (, for searing beef patties)
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3 Tablespoons butter
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8 ounces mushrooms (, sliced)
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1 medium onion (, sliced)
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2 cloves garlic (, minced)
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1/4-1/2 cup flour (, depending on how thick you like your gravy)
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3 cups broth ((beef, chicken or vegetable))
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kosher salt ( or sea salt , or to taste)
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black pepper to taste
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4 burger buns
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4 slices Swiss cheese (, or other preferred cheese)
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1/2 cup mashed potatoes