Preheat oven to 350°. Grease baking sheets; set aside.
In medium bowl, combine oats, flour, cinnamon, baking soda, and nutmeg; set aside.
In large bowl, with electric mixer, beat brown sugar, Hellmann's® or Best Foods® Real Mayonnaise, egg and vanilla 2 minutes. Gradually beat in oat mixture until blended. Stir in raisins. On prepared baking sheets, drop dough by level tablespoonfuls, 3-inches apart.
Bake 10 minutes or until golden. On wire rack, cool 2 minutes; remove from sheets and cool completely.