INGREDIENTS
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1/2 pound ground beef
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1/2 cup seasoned breadcrumbs
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1 large egg, lightly beaten
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1 tablespoon onion flakes
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1/2 teaspoon garlic powder
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1 teaspoon kosher salt
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1 teaspoon pepper
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1 tablespoon oil
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Gravy:
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1 cup sliced mushrooms
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1 yellow onion, halved and sliced
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2 tablespoons unsalted butter
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2 cups beef broth
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2 tablespoons flour
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1 teaspoon Kosher salt
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1 teaspoon pepper