""The best breakfast casserole I've ever made. I combine a few different recipes and this is my picky hubby's most favorite!"..."
INGREDIENTS
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cooking spray
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1 (12 ounce) package bacon
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1 teaspoon butter, or as desired
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1 (20 ounce) package frozen cubed hash brown potatoes
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salt and ground black pepper to taste
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1 (12 ounce) package sliced fresh mushrooms
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3 green onions, minced
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2 cups shredded Cheddar cheese, divided
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10 eggs
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2 cups milk
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1 teaspoon salt