Garlic Mashed Potato Casserole

By Chef Kris

4.48 / 5

15min

1h 05min

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3 pounds Yukon Gold potatoes or more as needed
½ cup milk hot
½ cup cream cheese softened
½ cup chopped green onions divided
1 egg lightly beaten
3 tablespoons butter
3 cloves garlic crushed and chopped, or to taste
½ teaspoon salt
½ cup shredded Cheddar cheese