In a high-sided saucepan, heat the olive oil over medium heat, then add the onion, garlic, and crushed red pepper. Heat, stirring often, until the onions have softened (3 to 4 minutes).
Add the crushed tomatoes, salt, and pepper. If you like a "saucier" sauce, you can also add a can of tomato puree here (optional). Turn the heat to high and bring the mix to a quick boil, then lower heat to a simmer. Simmer the sauce for 10 to 15 minutes, or until it reaches your preferred consistency.
Add the parsley and basil. Cook for an additional 2 minutes, stirring often.
Remove from the heat and allow it to cool for 5 minutes. Use with cooked pasta or as a spicy tomato-based dipping sauce.
Like it spicy? Go a little heavy handed on the crushed red pepper, especially if you opt for a "saucier" sauce by using additional tomato puree.