Preheat oven to 375 degrees F (175 degrees C). Bring a large pot of water to a boil. Add kielbasa and boil for 8 to 10 minutes to reduce the amount of fat; drain.
Skillet saute sauerkraut until almost caramelized.
Prepare mashed potatoes. Recipe below
Cut kielbasa into 2 equal portions, then split each lengthwise so that they lay flat but are still attached. Layer each sausage with sauerkraut and mashed potatoes. Top with grated cheese.
Bake in preheated oven for 10 to 12 minutes, or until heated through and cheese is melted.
Sour Cream Mashed Potatoes
3 Cloves Garlic Minced,
1 Teaspoon Sea Salt
6 Yukon Gold Potatoes, Cubed
1/2 Cup Sour Cream
1 (4 Ounce) Package Cream Cheese
1/2 Cup Butter
1/4 Cup Heavy Cream Or As Needed
Salt And Ground Black Pepper To Taste
Bring a large pot of water to a boil and stir in sea salt. Cook potatoes in the salted water until tender, about 30 minutes. Drain.
Transfer potatoes to a large bowl and add sour cream, cream cheese, butter, salt, and black pepper to the bowl. Cover bowl with a lid or a piece of aluminum foil and let mixture stand for 5 minutes to soften butter and cream cheese, about 5 minutes.
Mash potatoes until smooth, creamy, and thoroughly combined.