Step 1 (Cook Pasta): Bring a large pot of salted water to a boil. Add the penne pasta and cook according to package instructions until al dente. Reserve a small amount of starchy pasta water, then drain the penne.
Step 2 (Prepare Sauce): In a large skillet, heat olive oil over medium heat. Add the minced garlic and crushed red pepper flakes. Sauté for about 1 minute until fragrant and slightly golden.
Step 3 (Simmer Tomatoes): Pour the diced tomatoes into the skillet along with their juices. Season with salt and pepper to taste. Reduce heat to low and let the sauce simmer for 15–20 minutes to meld the flavors.
Step 4 (Combine Pasta & Sauce): Add the cooked penne pasta directly to the skillet with the arrabbiata sauce. Toss gently to coat evenly. If the sauce is too thick, add a splash of reserved pasta water.
Step 5 (Garnish & Serve): Transfer to serving plates or bowls, garnish with fresh parsley or basil, serve immediately, and enjoy the fiery kick!
