Heat the olive oil in a large soup pot over medium heat. Add the pancetta and saute until golden brown, about 5 minutes. Add the red pepper flakes and garlic and saute until tender, about 1 minute. Add the marinara sauce and bring to a simmer, then remove from heat and let cool until ready to use.
Makes about 5 cups.
Please Note: Nutritional values listed may vary from final results depending on actual measurements and brands used to prepare the recipe.