Some of Martha's all-time favorite recipes have something in common - they're made with nuts, lending both flavor and texture. See how she uses almonds, hazelnuts, peanuts, walnuts and pecans to create a traditional linzertorte, oatmeal cookies sandwiched with a creamy peanut butter filling, a famous walnut cake named after Saint Andrew, and an impressive-looking pecan tart with a secret ingredient.