INGREDIENTS
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2 tablespoons vegetable oil
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1/2 cup thinly sliced white or yellow onion
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8 ounces cremini (brown button mushrooms, rinsed and thinly sliced)
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1 teaspoon minced garlic
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1/2 teaspoon all-purpose seasoning salt (like Lawry's)
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fresh ground black pepper (to taste)
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1 5 ounce package fresh baby spinach (see recipe note if you want to use frozen spinach)
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3/4 cup crumbled feta cheese
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7 large eggs
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1 cup whole milk (can use half-and-half or heavy cream or a combination)
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1 tablespoon all-purpose flour
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1/4 cup grated Parmesan
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1/2 teaspoon salt
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fresh ground black pepper (to taste)
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1/2 cup shredded Swiss cheese