Buckwheat Walnut Bread

makes 1 loaf. Combine yeast, sugar and warm water. Let sit until foamy, about 10 mins. In a large bowl combine buttermilk, maple syrup, oil or butter and salt, Add zest, buckwheat flour and 1 cup of all purpose flour. Beat with whisk until smooth. Add yeast mixture. Beat well. Add 2 cups of all purpose flour and walnuts. Mix well. Dough will be soft. Turn out onto work surface and knead until elastic and hold shape, about 10 minutes. Add small amounts of flour as needed if dough is too sticky. Form into a ball and put into a bowl. Cover bowl with towels or plastic and let rise until double 1 1/2 - 2 hours. Deflate dough. Put in buttered loaf pan. I like to press dough flat, then roll up jelly roll fashion and place in pan. Let rise again until dough is just about as high as you'd like it, maybe another hour or so. Preheat oven to 375 F. Bake 40-45 minutes. Let cool before slicing.