Add the oil to a medium-sized pot over medium-high heat, once the oil is hot, add the garlic and let it cook for a minute, stir in the red pepper flakes, tomatoes, and sugar, reduce the heat and let it simmer, stirring occasionally, for about 15 minutes.

While the sauce is simmering, boil a large, salted pot of water for your pasta, Cook it al dente according to package directions, Season the sauce with salt & pepper as needed. I added a fair bit of salt.

Drain the pasta and toss with the sauce, served hot.