Preheat the oven to 180 °C. In a bowl, combine the yoghurt and condensed milk and lightly whisk/ mix by hand until smooth and combined. Empty this into a wide, flattish ceramic or cast-iron ovenproof dish or 2 – 3 smaller ovenproof ceramic dishes.
Place the dish/ dishes in a high sided roasting tray and fill the tray with hot water to about 3/4 of the way up the sides. Bake for 50 minutes until starting to turn golden and set.
Remove from the oven, take out the water bath and allow to cool to room temperature. Cover and refrigerate until cold and serve. This can be made the day before.
When the dessert is cooled and ready to serve, top with whipped cream, fresh berries and toasted nuts.