Peel and wash the potatoes and cut into eight pieces lengthwise. Fry in a pan in hot oil at medium heat for about 20 minutes. Turn more often. Season with salt and pepper
In the meantime clean or peel and wash the vegetables. Cut cucumber, carrots and celery into long sticks
For the tomato salsa, dice the tomatoes and cut the spring onions into rings. Season both with salt, pepper and vinegar
For the avocado dip, peel and coarsely chop the garlic. Wash and pluck the parsley. Cut avocado in half, stone and peel. Puree everything and mix with quark. Season to taste with salt and pepper. Arrange the vegetable sticks with the dips