Lightly spoon flours into dry measuring cups, and level with a knife. Combine the bread flour, water, and yeast in a large bowl; stir well with a whisk. Cover and let stand at room temperature 1 hour.
Place 1/2 cup flaxseed in a spice or coffee grinder; process until finely ground to measure 3/4 cup. Add the ground flaxseed, whole-wheat flour, 2 tablespoons whole flaxseed, and next 5 ingredients (2 tablespoons flaxseed through salt) to the yeast mixture, and stir until a soft dough forms (dough will feel tacky). Turn dough out onto a lightly floured surface. Knead until smooth and elastic (about 5 minutes); add enough of remaining 3 tablespoons bread flour, 1 tablespoon at a time, to prevent the dough from sticking to hands. Shape dough into a 5-inch round loaf; place on a baking sheet coated with cooking spray and sprinkled with cornmeal. Brush loaf with egg white; sprinkle with 1 teaspoon flaxseed. Make 3 diagonal cuts 1/4-inch-deep across top of loaf using a sharp knife. Cover and let rise in a warm place (85°) 1 hour or until doubled in size. (Press two fingers into dough. If the indentation remains, the dough has risen enough.)
Preheat oven to 375°.
Bake at 375° for 30 minutes or until bread sounds hollow when tapped. Remove from pan; cool on a wire rack.
Note: Flaxseed can be found in health-food stores and some supermarkets. Because it's rich in fat, you'll want to store flaxseed in the refrigerator or freezer. It will stay fresh for up to 6 months.