Wash the potatoes and cook in boiling water for about 20 minutes. Meanwhile grate the Gouda and Cheddar. Cut blue cheese into fine cubes. Drain potatoes, rinse with cold water and peel.
Cut the potatoes diagonally and place them in a greased, ovenproof dish. Place prepared cheese and cream cheese separately on top. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 20 minutes until golden brown.
In the meantime, wash the tomato, rub it dry, quarter it, cut out the seeds and finely dice the flesh. Wash the chives, dab dry and cut into fine rolls. Remove the mould from the oven and sprinkle with diced tomatoes and chives.
Garnish with parsley and serve immediately. Salad tastes good with it.