Gorgonzola Cream Soup

Whisk flour with wine until smooth. Peel onion and chop finely. Heat butter in a saucepan and saute onion, add coarsely chopped gorgonzola and melt on low heat. Add remaining wine, bring to a boil, add flour mixture and whisk until smooth. Add broth and bring to a boil, stirring constantly. Rinse tomatoes, cut into quarters, remove seeds and cut into wedges.