One of our family’s favorite dishes growing up was the delicious mashed potato recipe Mom would prepare to accompany her roast pork loin, roasted chicken, and, on Thanksgiving, her big roasted turkey. Her secrets? Idaho potatoes, peeled and boiled until fork-tender. Lots of fresh butter. A lot of cream cheese and hot milk added for creaminess. Salt and pepper, of course. It was not possible to find Yukon Golds in the Nutley Co-Op, where we shopped for all our groceries in the ’40s, or in the ShopRite, which came to Nutley, N.J., in the early ’50s. But these days, I love the tenderness of Yukon Golds, and I grow a hardy crop of them in my Bedford garden in New York. I also use both heavy cream and milk, and I use a food mill with the finest sieve to ensure the creamiest, smoothest and silkiest mashed potatoes ever.