"Layers of mashed potatoes, cheese and roasted garlic-infused broccoli make this casserole like two sides in one at a holiday gathering or potluck...."
INGREDIENTS
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3 1/2 pounds red new potatoes, peeled and quartered
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1/2 small head of garlic, outer skins peeled off
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3 tablespoons plus 1/2 teaspoon extra-virgin olive oil, divided
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1/2 cup low-sodium chicken or vegetable broth
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1/4 cup sour cream
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2 large eggs, beaten
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1 teaspoon salt, plus more to taste
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2 thinly sliced green onions
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3 cups chopped broccoli florets (about 2 small heads)
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Freshly ground pepper, to taste
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2 cups grated Cheddar cheese, divided