Heat oven to 350 F. Grease bottom only of 9x5 inch loaf pan. Beat eggs in large bowl. Add sugar, eggnog, margarine, rum extract and vanilla; blend well. Lightly spoon flour into measuring cup; level off. Add flour, baking powder, salt and nutmeg; stirring just until dry ingredients are moistened. Pour into greased pan. Bake for 45-50 minutes. Cool in pan for 10 minutes then remove. Cool completely