Preheat oven to 375 degrees. Line a baking sheet with parchment paper and set aside.

Wash and peel potatoes. Cut four of the potatoes into cubes and place in a saucepan. Cover with cold water and bring to boil. Boil for 15-20 minutes, until they break apart when pierced with a fork. Drain, add 2 tablespoons of the butter and mash until smooth.

Grate 3 remaining potatoes on the course side of a box grater. Over a colander squeeze out as much of liquid from the grated potatoes as possible. Lay them out between two sheets of paper towel and pat until dry.

Add grated potatoes to a large mixing bowl. Add milk, salt and pepper, and stir. Beat in mashed potatoes until smooth.

Sift together flour and baking powder and add to the potato mixture. Stir until dough starts to come together. Using your clean hands, knead lightly until you have a smooth dough.

Divide dough into 4 equal parts and shape into 4 round, flat loaves, place on prepared baking sheet and cut a deep cross into each loaf, careful not to cut all the way through.

Bake 35-40. minutes, until tops are gold brown and loaves have risen.

Remove from oven and brush remaining 2 tablespoons of butter over each loaf, sprinkle with dried dill if desired.