Sauerkraut and Smoked Pork with Mashed Potatoes (Kassler mit Kartoffelpüree und Sauerkraut) [by Cooking Krautz]

Here is the list of ingredients (how it is prepared can be seen in the Video):
800g smoked pork chop
1 kg potatoes
300ml milk
Salt and pepper
150g butter
1 can pineapple
1 can sauerkraut
1 onion
40g flour
200 ml cream
2 bay leaf