Kapusta

Step 1
Preheat the oven to 350 degrees F (175 degrees C).

Step 2
Place cabbage in a medium saucepan; add water to cover. Bring to a boil over high heat; cook until tender, about 10 minutes. Drain.

Step 3
While the cabbage is cooking, melt 4 tablespoons butter in a large skillet over medium heat. Add onions and mushrooms; saut? until tender, 5 to 7 minutes. Remove from the heat.

Step 4
Combine drained cabbage, onion-mushroom mixture, sauerkraut, sugar, thyme, salt, and pepper in a 9×13-inch baking dish; mix until well combined. Cut remaining 2 tablespoons butter into small pieces and arrange over top. Cover with aluminum foil.

Step 5
Bake in the preheated oven for 1 hour, stirring every 20 minutes.