Add olive oil to large pot and saute chopped onion, celery and garlic on medium heat for 4-5 minutes.
Add crushed tomatoes, spices, and 1 Tablespoon of the sugar.
Reduce heat and let simmer for 20-30 minutes.
Taste test and if necessary add more spices to taste (and/or the remaining tablespoon of sugar).
Use an immersion blender if smoother consistency is desired.
Serve on pasta, pizza, etc.
Can use fresh herbs in place of dried. Typically 1 teaspoon of dried equals 3 teaspoons (or 1 tablespoon) of fresh herbs. Oregano and basil are suggestions, you can substitute other italian spices as you like. Option to add other vegetables (like mushrooms!) while you saute onion.*Nutrition information is for 1 cup of marinara sauce.