Spicy Arrabbiata Sauce

Bahan-bahan (6 porsi)

• 3 tablespoons extra virgin olive oil (or butter)
• 2 -4 teaspoons crushed red pepper flakes*
• 1 small yellow onion, finely diced
• 6 large cloves garlic, minced or pressed
• 2 (28-ounce) cans whole tomatoes, preferably San Marzano
• 1/2 cup packed fresh basil leaves, torn or roughly-chopped
• 1 teaspoon fine sea salt
• 1/2 teaspoon freshly-cracked black pepper