Thaw dough.

When the dough has thawed, preheat your oven to 450 degrees, and bring a pot of water and baking soda to a rolling boil on the stove. Line a cookie sheet with parchment paper and coat it lightly with olive oil.

Take each roll and stretch it out. Cut each roll into about 6 pieces. Roughly roll each piece into a ball.

Drop dough balls a few at a time, into the boiling water, and boil for 30 seconds.

Place the dough balls on the prepared cookie sheet, and brush them lightly with egg wash and sprinkle them with coarse sea salt.

Bake them for about 10 minutes, or until they are nicely browned. Move to a cooling rack for a couple of minutes.

While they are baking, make your cheese sauce. Warm Milk in the microwave. Make a roux with butter and flour. (melt butter over medium heat in a saucepan. Whisk in flour until dissolved and smooth) Add warmed milk and whisk until smooth. Add cheese. Whisk until melted. Whisk in chopped sauerkraut. Pour into a bowl, top with caraway seeds if desired. Serve cheese warm with warm pretzels.