Best Ever Mashed Potatoes

Cover 4 lb. Yukon Gold potatoes, peeled, cut into 2" pieces, and 1¾ tsp kosher salt with cold water in a large pot. Bring to a low boil on the stovetop over high heat, then reduce heat and simmer (do not boil) until potatoes are very tender when pierced with the tip of a paring knife but not falling