Mashed Potatoes & Carrots

1 1/2 lbs russet potatoes , peeled, rinsed, cut into large chunks 3/4 lb carrot , trimmed, cut into 2-inch pieces 1 1/2 tablespoons unsalted butter , softened[...]

8 medium red potatoes 6 -7 medium carrots 1/4 lb butter , do NOT use margarine 2/3 cup buttermilk Lawry's Seasoned Salt, to taste black pepper , to taste 1[...]