In the bowl of a mixer whisk together warm milk, butter, sugar and yeast. Let stand for 1 minute. Whisk in the eggs then the potatoes and chives. When the mixture is smooth Place on the mixer with dough hook attachment. Add the flour and salt to the bowl and start the mixer. Mix for 5-8 minutes. The dough will be sticky, but should clear the sides.
Liberally dust a countertop with flour. Place the dough on the counter sprinkle with four and knead 4-6 times to form a ball. Place in a greased bowl. Cover and proof for 1 hour or doubled in size. Remove from the bowl and divide into six pieces. Fold each piece over 3-4 times to form a log shape and place in a loaf pan. Cover and proof for 30 minutes or doubled in size.
Preheat oven to 350 degrees. Brush the loaf with egg wash. Bake for 25-30 minutes. Temperature should be at least 180 degrees and the top browned.