Serves 8-10 Active Time 30 minutes Total Time 1 hour Ingredients * 4 medium russet potatoes (about 2 pounds), peeled * 1 1/2 teaspoons kosher salt, divided * 3/4 teaspoon freshly ground black pepper, divided * 2 tablespoons vegetable oil * 3 tablespoons unsalted butter, divided * 4 medium shallots, thinly sliced * 6 large…