Combine saffron and 2 teaspoons water in a small bowl; let stand 5 minutes. Place saffron mixture, 2 egg yolks, 3/4 cup warm water, and next 5 ingredients, including yeast packet from bread mix) in a bread machine. Set bread machine to "dough" setting according to manufacturer's instructions; start machine. When dough cycle is complete, turn dough out onto a lightly floured surface, and knead several times. Form dough into a loaf, and place in a greased 9" x 5" loafpan. Let dough rise in a warm place (85°), free from drafts, for 1 hour or until doubled in size. Combine remaining egg yolk with 1 tablespoon water. Brush top of loaf with egg wash, and sprinkle with turbinado sugar. Bake at 350º for 32 minutes or until golden. Remove from pan, and cool completely on a wire rack.