<human>:  What is the best way to cook a marinara sauce?
<bot>: The best way to cook a marinara sauce is to sauté garlic and onions in olive oil for about five minutes. Then add chopped tomatoes and seasonings, such as oregano, salt and pepper. Simmer for about 20-25 minutes, stirring occasionally until the sauce is thick and flavorful. Finally, stir in some fresh basil leaves and you are done! Enjoy your homemade marinara sauce.