Cook the Pasta: In a large pot of boiling salted water, cook the penne according to package instructions until al dente. Drain and set aside.
Prepare the Sauce: In a large skillet, heat the olive oil over medium heat. Add the minced garlic and red pepper flakes, cooking for about 1 minute until fragrant, being careful not to burn the garlic.
Add Tomatoes: Pour in the crushed tomatoes and season with salt. Stir well, then bring to a simmer. Let it cook for about 10-15 minutes, allowing the sauce to thicken slightly.
Combine: Add the cooked penne to the sauce, tossing to coat the pasta evenly.
Serve: Plate your spicy Penne Arrabbiata and garnish with chopped parsley and grated Parmesan cheese if desired.