In a large bowl, combine 2 cups all-purpose flour, 3/4 cup oats, sugar, walnuts, sunflower kernels, yeast and salt. In a small saucepan, heat the water, oil, buttermilk and honey to 120°-130°. Add to dry ingredients; beat until well blended. Beat in 1 egg until smooth. Stir in whole wheat flour and enough remaining all-purpose flour to form a soft dough.
Turn onto a floured surface; knead until smooth and elastic, about 6-8 minutes. Place in a greased bowl, turning once to grease the top. Cover and let rise in a warm place until doubled, about 1 hour.
Punch dough down; turn onto a lightly floured surface. Divide in half; shape into round loaves. Sprinkle 2 tablespoons oats on a greased baking sheet; place loaves over oats. Cover and let rise until doubled, about 45 minutes.
Beat remaining egg and cold water; brush over loaves. Sprinkle with remaining oats. Bake at 350° for 20-25 minutes or until golden brown. Cool on wire racks.
Every editorial product is independently selected, though we may be compensated or receive an affiliate commission if you buy something through our links. Ratings and prices are accurate and items are in stock as of time of publication.