50gparmesan cheese, grated (optional for garnishing)
Instructions
In a large pot, bring salted water to a boil. Add the spaghetti and cook according to package directions until al dente. Reserve 1 cup of pasta water, then drain and set the pasta aside.
In a large skillet, heat the extra virgin olive oil over medium heat. Add the chopped red onion and sauté for 3-4 minutes until softened. Then, add the minced garlic and red pepper flakes, sautéing for an additional 1-2 minutes until fragrant (be careful not to burn the garlic).
Add the diced heirloom tomatoes to the skillet. Season with salt and pepper. Cook for about 5-7 minutes, stirring occasionally, until the tomatoes soften and release their juices, creating a light sauce.
Add the cooked spaghetti to the skillet, tossing it with the tomato mixture. If the pasta seems dry, gradually add some reserved pasta water until you reach your desired consistency.
Remove the skillet from heat and gently fold in the fresh basil leaves. Adjust seasoning with additional salt, pepper, or red pepper flakes as needed.
Plate the pasta in bowls or on a large serving dish. If desired, sprinkle with grated parmesan cheese before serving.
Notes
Feel free to adjust the amount of red pepper flakes based on your heat preference.