"It's perfect for meal prep, it comes together fast, and I always have the ingredients on hand...."
INGREDIENTS
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2 ounces Gruyère, fontina, or low-moisture mozzarella cheese, shredded (1/2 cup)
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8 ounces fresh mushrooms, such as white button, cremini, shiitake, or oyster mushrooms, or a combination
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2 medium scallions
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1 small bunch fresh thyme
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8 large eggs
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1/2 cup heavy cream, half-and-half, or whole milk
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1 teaspoon Dijon mustard
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1 teaspoon kosher salt, divided
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1/4 teaspoon freshly ground black pepper
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2 tablespoons unsalted butter, divided