Mashed Potatoes With Corn and Chives with butter

2 lbs thin-skinned potatoes , like Yukon Golds, scrubbed but not peeled, sliced 1/4-inch thick 3 large garlic cloves 1 1/2 cups corn kernels (fresh or frozen)[...]

3 1/2 lbs yukon gold potatoes 1 1/4 teaspoons salt 3/4 cup milk 1/2 cup sour cream 1 -2 teaspoon snipped fresh chives 1/4 teaspoon pepper 1 Peel potatoes and[...]