1Heat olive oil in a large, deep skillet or pot over medium heat (175°C/350°F). Add minced garlic and cook for 30 seconds until fragrant, being careful not to burn.
2Pour in diced tomatoes, broth, and Italian seasoning. Bring to a boil, then add the dry fettuccine, pushing it down into the liquid. Reduce heat to medium and cook uncovered for 10-12 minutes, stirring occasionally to prevent sticking.
3Once pasta is al dente and most liquid has been absorbed, stir in heavy cream and half the parmesan cheese. Cook for 2-3 minutes until sauce thickens and becomes creamy. Season with salt and pepper to taste.
4Divide pasta among 4 bowls. Top with remaining parmesan, fresh basil leaves, and red pepper flakes if desired. Serve immediately. Minimal cleanup with maximum flavor—all in one pot!