Heat olive oil in a heavy-bottomed soup pot. Saute onion until soft and translucent, 3-5 minutes. Add garlic and saute until fragrant, 1 minute. Add tomatoes, tomato paste, broth, dried basil, pepper and salt. Bring to a boil, reduce to a simmer and cook 10 minutes. Stir in fresh basil and serve with garlic toasts.