Immerse the noodles for 3 minutes in a large pot of boiling water. Drain when the noodles are cooked. Cut the onion into thin strips. Cut the tomatoes in quarters. Peel and chop the garlic. In a large frying pan, heat 2 tablespoons of oil. Brown the onion and garlic. Add the shrimp. About 5 minutes before the end of cooking, add the quartered tomatoes. Season with truffle oil. Add the noodles and mix the preparation. Sprinkle with coriander before serving.