In a bowl, mix the potatoes with the oil, garlic, salt and half of the cheese and thyme. Transfer the potatoes to the prepared tin, press down gently.
Approx. 20 mins. in the centre of an oven preheated to 220°C. Remove, sprinkle with the remainder of the cheese and thyme, bake for a further 10 mins.
Mix the cream cheese with the lemon juice, cheese and thyme, serve alongside.