INGREDIENTS
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3 tablespoons unsalted butter
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1 medium onion, thinly sliced
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2 teaspoon fresh thyme, minced
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1/4 teaspoon kosher salt
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1/4 teaspoon black pepper
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12 sweet rolls
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10 slices provolone cheese
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14 ounces sliced deli roast beef
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1/2 cup unsalted butter, melted
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1 & 1/2 tablespoons dried onion soup mix
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1 packet au jus gravy mix
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3 cups water
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fresh chopped parsley for garnish, optional
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