Tomato and Fresh Basil Soup

Name: Tomato and Fresh Basil Soup
Cuisine: European, Italian, Mediterranean
Ingredients: 1 tablespoon olive oil; 2 tablespoons butter; 1 onion, minced; 2 lbs ripe Italian plum tomatoes, roughly chopped; 1 garlic clove, roughly chopped; About 3 cups chicken or vegetable stock; 1/2 cup dry white wine; 2 tablespoons sun-dried tomato paste; 2 tablespoons shredded fresh basil, plus a few whole leaves, to garnish; 2/3 cup heavy cream; Salt and freshly ground black pepper