Scald milk in a saucepan; add butter, sugar and salt. Stir until butter melts; cool to lukewarm. In a small bowl, dissolve yeast in warm water; add to milk mixture. Stir in all-purpose flour and 1 cup whole wheat flour until smooth. Add sesame seeds, poppy seeds and enough remaining whole wheat flour to make a soft dough., Turn onto a floured surface; knead until smooth and elastic, 8-10 minutes. Place in a greased bowl, turning once to grease top. Cover and let rise until doubled, about 1 hour., Punch dough down. Roll to 1/3-in. thickness on a cornmeal-covered surface. Cut into circles with a 3-1/2-in. or 4-in. cutter; cover with a towel and let rise until nearly doubled, about 30 minutes., Place muffins, cornmeal side down, in a greased skillet; cook over medium-low heat for 12-14 minutes or until bottoms are browned. Turn and cook about 12-14 minutes or until browned. Cool on wire racks; split and toast to serve.