Natural yoghurt (Varoma method)

Name: Natural yoghurt (Varoma method)
Prep time: 15 min
Cook time: 13 h
Total time: 13 h 15 min
Cuisine: World Cuisine
Ingredients: 55 g natural yoghurt (see Tips); 1000 g full cream milk (see Tips); 50 g full cream milk powder (see Tips); 30 g caster sugar (optional); 250 g water; 30 g lemon juice (see Tips)