French Bread

Originally from recipezaar.com

2 cups rice flour(white)
1 cup tapioca flour
3 teaspoons xanthan gum
1 1/2 teaspoons salt
2 teaspoons egg substitute (optional)
2 tablespoons sugar
1 1/2 cups lukewarm water
2 tablespoons fast rise yeast
2 tablespoons butter or margarine, melted
3 egg whites, beaten slightly
1 teaspoon vinegar
melted butter, for brushing (optional)
Directions
1In the bowl of a heavy-duty mixer, place flours, xanthan gum, salt, and egg replacer (if used).Blend with mixer on low.
2In a small bowl dissolve the sugar in the water, and add yeast.
3Wait until the mixture foams slightly, then blend into the dry ingredients.
4Add the butter, egg whites, and vinegar.Beat on high for 3 minutes.
5To form loaves, spoon dough onto greased and cornmeal-dusted cookie sheets in two long French-loaf shapes or spoon into special French-bread pans.
6Slash diagonally every few inches.If desired, brush with melted butter.
7Cover the dough and let rise in a warm place until doubled in bulk, 20 to 25 minutes.
8Preheat oven to 400 degrees. Bake for 40 to 45 minutes.
9Remove from pan to cool.