Creamy Tomato Basil Soup

2 C chopped onions
1/2 t thyme
1/2 t basil
3/4 c butter, divided
2 T olive oil
4 cans italian timatoes
4 T tomato paste
4 c chicken broth
1/4 c flour
1 c heavy cream
1 t sugar
Salt and Pepper

In a large pot saute onions, thyme, basil in 1/2 c butter and olive oil unti lonion wilts. Add tomatoes and paste, simmer for 10 minutes. In a seperate bowl, mix 5 T broth, to flour intil smooth. Stir in flour mixture to soup. Add remaining broth and simmer for 30 minutes. Put soup in blender until smooth, just before serving, add sugar, cream and butter. Salt and Pepper to taste.