"These egg white muffins make a gorgeous brunch dish or a quick weekday breakfast. You can make them in advance and refrigerate them...."
INGREDIENTS
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1 tablespoon butter (for the ramekins)
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4 large egg whites
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1/4 teaspoon Diamond Crystal kosher salt
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1/4 teaspoon black pepper
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1/4 teaspoon garlic powder
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1/4 cup grated Parmesan
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1/4 cup green onions (chopped, green part only)