Little piggy faces

Name: Little piggy faces
Prep time: 40 min
Cook time: 2 h 30 min
Total time: 2 h 30 min
Yield: 18 portions
Ingredients: 100 g unsalted butter; 600 g plain flour; 100 g full cream milk; 150 g natural yoghurt; 50 g pouring (whipping) cream; 2 tsp dried instant yeast; 1 tsp white sugar; 1 egg; 1 tsp salt; 500 g pork fillet; ¼ tsp ground ginger; ¼ tsp ground coriander; ¼ tsp salt; ½ tsp ground black pepper; 1 tsp sesame oil; 2 tbsp cornflour; 1 tbsp soy sauce; 1 egg yolk; 1 egg; 40 currants; 2 tsp pouring (whipping) cream