Heat oven to 375°F. In large bowl, beat margarine and sugars until creamy. Add egg and vanilla; beat well. Add combined flour, baking soda, cinnamon, salt and nutmeg; mix well. Add oats; mix well. Drop dough by rounded tablespoonfuls onto ungreased cookie sheets. Bake 8 to 9 minutes for a chewy cookie or 10 to 11 minutes for a crisp cookie. Cool 1 minute on cookie sheets; remove to wire rack. Cool completely. Store tightly covered.