Creamy Gorgonzola Soup with Tomato

Mix flour with some wine in a bowl until smooth. Peel onion and chop finely. Melt butter in a pot and saute onion until soft. Add coarsely chopped gorgonzola and melt over low heat while stirring, add remaining wine, bring to a boil, add smooth flour mixture while stirring, add vegetable broth and boil everything while stirring, reduce heat and simmer for a few minutes. Meanwhile, rinse tomatoes, cut into quarters, remove seeds and cut into wedges.