Split 4 hard rye rolls; spread with soft butter or margarine. Place on rack in broiler pan and broil for 5 minutes.

Prepare the dough: Whisk the warm milk, yeast, and 1 Tablespoon of sugar together in the bowl of your stand mixer. Cover and allow to sit for 5 minutes. *If you do not own a stand mixer, you can do this in a large mixing bowl and in the next step, mix the dough together with…