INGREDIENTS
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1/4 cup unsalted butter (1/2 of a stick)
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2 cups sweet yellow onions, diced
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1 teaspoon dried Basil (optional, but good!)
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1 package Au Jus Gravy Mix (1 ounce)
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3 cups water
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4 slices baguette bread, toasted
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1 cup shredded mozzarella
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