In a medium-sized pot, sauté the onion with a few tablespoons of water for 5 to 7 minutes until the onions are translucent. Add the garlic, oregano, basil, and red pepper flakes and continue to simmer for another 2 minutes.
Add the crushed tomatoes and tomato paste and bring to a simmer. Partially cover and simmer for 30 to 35 minutes. Once t