Baked Cabbage Pierogis

Name: Baked Cabbage Pierogis
Prep time: 1 h 10 min
Cook time: 2 h 30 min
Total time: 2 h 30 min
Yield: 25 piece
Ingredients: 200 g all purpose white flour; 100 g unsalted butter; 50 g sour cream; 1 egg; ¼ - ½ tsp paprika, sweet; ¼ tsp salt; 500 g water; 220 - 250 g savoy cabbage; 80 g onion; 50 g unsalted butter; 10 sprigs parsley, fresh; 1 tsp salt; ½ tsp black pepper, ground; 1 egg yolk; 1 tbsp sour cream; all purpose white flour; caraway seed