Stir together half cup of the rice flour, the yeast, sugar and half cup of the warm water in a 2-cup glass measure. Let rest in a warm place until doubled in volume, about 10 minutes. Line a large baking sheet with parchment paper and draw two 20 cm circles on it (use a cake pan as a guide). Beat egg whites lightly, add olive oil, chopped olives and 2 teaspoons of the rosemary; set aside. Combine garlic and egg yolk; set aside. (Garlic will perfume the glaze but won't burn in the oven, as chopped garlic would.) Combine remaining 1 cup rice flour, the corn flour, cornstarch, xanthan gum powder and salt in bowl. Add remaining 0.75 cup warm water to egg white-olive mixture a stir into flour. Stir in yeast mixture and beat until smooth. Using a rubber spatula, spread soft dough into 20 cm circles marked on the parchment paper heaping it up slightly in the middle. Cover loaves with lightly greased plastic wrap and let rise until doubled in bulk, about 1 hour. Preheat oven to 220ºC . Discard garlic and brush egg glaze over loaves. Sprinkle tops with remaining 2 teaspoons rosemary. Using a razor blade, slash tops of loaves into a large diamond grid pattern. (Use an up-and-down cutting motion rather than dragging the blade through the soft dough.) Bake for 20 minutes, until well browned. Makes two 20 cm diameter, 11-ounce loaves. Note: Brown rice flour and corn flour may be found in some health food stores and Rainbow Groceries. PER SERVING ( 0.125 of a loaf): 115 calories, 3 g protein, 18 g carbohydrate, -20ºC at (2 g saturated), 13 mg cholesterol, 344 mg sodium, 0 g fiber, From an article by Jacqueline Mallorca in the San Francisco Chronicle, 0. 477897252090.8.