Preparation

Bring a large pot of water to boil. Add penne and cook for 10 minutes, or until tender. Remove from heat, and drain. Heat oil in a medium saucepan, and add garlic and red pepper flakes. Cook until the garlic is lightly browned. Add tomatoes, breaking them up with a spoon. Bring to a boil, and then reduce to a simmer and cook, covered, for about 30 minutes. Transfer pasta to a large serving bowl and top with sauce and fresh parsley. Serve with Parmesan cheese if desired.