Clean, wash and possibly halve the spring onions. Wash and halve the tomatoes
Heat the oil in a pan. Sauté the spring onions in it in portions while turning for about 5 minutes. Take out
Caramelise the sugar in the frying fat until golden brown. While stirring, deglaze with vinegar and 100 ml water. Simmer while stirring until the caramel is dissolved. Season with salt, pepper and thyme
Toss the tomatoes and onions in the marinade. Cover and leave to stand for at least 5 hours. Roast the seeds without fat. Arrange spring onions and sprinkle with seeds. Slice cheese over it. Garnish if necessary.