Wrap the potatoes in tin foil and place directly onto the oven middle oven shelf.
Prepare the rest of the dish whilst the potato is cooking. Crumble the feta cheese into a mixing bowl, mix in the spring onion, olive oil and orange juice.
Toast the cumin seeds in a small saucepan and allow to cool.
Add the cooled cumin seeds to the feta and orange mixture and place in the fridge.
Arrange the salad onto plates.
Cut the potatoes in half and spoon the feta and orange mixture into the potato.