Place tomatoes and juice in a stock pot over medium heat. Simmer for 30 minutes. Puree the tomato mixture along with the basil leaves, and return the puree to the stock pot.
Place the pot over medium heat, and stir in the heavy cream and butter. Season with salt and pepper. Heat, stirring until the butter is melted. Do not boil.
In addition to all the great vendors, the Vicksburg Farmers' Market depends on the help of volunteers each Saturday. If you're willing to sign up for a Saturday shift, please e-mail firstname.lastname@example.org. Volunteers typically sell soft drinks (funds support market advertising), answer customer questions, and assist vendors -- when needed -- to set up booths. As the summer wears on, we'll need more help. Please don't just shop the market. Volunteer to work on a market Saturday if you'd like to see this great summer event continue!