Ina Garten Tomato Basil Soup is made with ripe plum tomatoes, good olive oil, yellow onions, garlic, unsalted butter, crushed red pepper flakes, canned plum tomatoes, fresh basil leaves, fresh thyme leaves, and chicken stock or water. This easy Roasted Tomato Basil Soup recipe creates a hearty soup that takes about 1 hour and 30 minutes to prepare and can serve up to 6 people.