Bring a large pot of water to boil and cook pasta, following the instructions on the package, about two to three minutes. While cooking, add one tablespoon olive oil to the water.

Meanwhile, sauté the garlic and scallions in the remaining olive oil in a large skillet for three to four minutes. Add the basil leaves, cherry tomatoes, salt and pepper and sauté for five more minutes.

Add diced tomatoes and let the mixture simmer for 15 minutes, stirring occasionally.

When the pasta is ready, drain well. Return pasta to pot and pour the tomato mixture over it. Toss and serve.