In a large bowl, beat together sugar and egg replacer.  In a small bowl, combine flour, baking powder, salt, and nutmeg.  Pour into egg mixture and stir to combine.  Pour in vegetable oil, rice milk, and vanilla.  Divide among 9 sprayed muffin cups filling about 3/4 full.  Bake at 350 for 16-18 minutes or until a toothpick comes out clean.  While still hot out of the oven, brush melted margarine on the top of each muffin.  Remove from pan and roll in sugar.  Cool on a wire rack.