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Slow Roasted Tomato Sauce

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My delicious and simple recipe for a sweet, homemade Slow Roasted Tomato Sauce, this sauce is such a handy staple that you’ll use for so many dishes!

Slow Roasted Tomato Sauce recipe

Slow Roasted Tomato Sauce

A couple of weeks ago I shared a recipe for Roasted Tomato and Whipped Goat Cheese Spread using up what I thought was my “end of the summer” tomatoes, only to find out that the tomatoes would keep on coming . I am not complaining considering tomatoes are one of my favorite things to cook with, put in salads or just pop in my mouth and eat.  Today I am sharing another end of the summer tomato recipe for Slow Roasted Tomato Sauce.

Slow Roasted Tomato Sauce - pasta sauce

If you don’t have any tomatoes from your garden just buy them at your local farmers market or grocery store.  I like the flavor of slow roasted tomatoes and will take them any day over a can of plain old diced tomatoes.  While you are roasting your tomatoes you can begin the rest of the preparations for your sauce.

Pasta Sauce recipe - Slow Roasted Tomato Sauce

This Slow Roasted Tomato Sauce uses carrots, onion and zucchini but feel free to modify using whatever vegetables you have laying around or meat if you prefer. I like making a pot of this for a meal and freezing a batch for a rainy day.

Slow Roasted Tomato Sauce recipe

Slow Roasted Tomato Sauce

  • Author: Julia // A Cedar Spoon
  • Prep Time: 20 minutes
  • Cook Time: 1 hour 30 minutes
  • Total Time: 1 hour 50 minutes
  • Yield: 4-5 1x
  • Category: Sauce
  • Cuisine: Italian


A sweet slow roasted tomato sauce perfect for using up end of the summer tomatoes.



  • 4 cups tomatoes, cubed
  • Olive oil
  • Salt
  • Pepper
  • 4 garlic cloves, minced
  • 1/4 sweet onion, chopped
  • 2 carrots, chopped
  • 1/2 zucchini, chopped
  • 2 Tbsp. tomato paste
  • 215oz cans of tomato sauce
  • 1 tsp thyme
  • 1/2 tsp red pepper
  • 1 tsp basil
  • 2 bay leaves
  • 2 tsp oregano
  • 1 Tbsp. sugar


  1. Preheat oven to 225 degrees.
  2. In a medium mixing bowl mix the cubed tomatoes with olive oil, salt and pepper (I just drizzle the olive oil on the tomatoes to coat them). Mix well.
  3. Place the tomatoes on a baking sheet (I put foil down to keep the mess contained).
  4. Roast tomatoes for 1 hour.
  5. While the tomatoes are roasting drizzle olive oil on the bottom of a large pot and heat on medium heat. Add garlic and onion and sauté until translucent.
  6. Add carrots and zucchini and continue to sauté until soft.
  7. Add tomato paste, sauce and remaining ingredients and let simmer stirring occasionally until the tomatoes are done roasting.
  8. Once the tomatoes are done roasting add them to the sauce and continue simmering for 30 minutes.
  9. Remove from heat and serve over warm pasta, ravioli along with crusty garlic bread.


This sauce freezes great. Make sure you cool it completely and then freeze it in a Tupperware container or lay flat in large freezer ziplock bags.[br]Feel free to add different vegetables you may have on hand or meat.[br]For the tomatoes you can use any variety of tomato—if you use cherry tomatoes just half the tomatoes to roast.



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Homemade Minestrone Soup Recipe - A Cedar Spoon

Sunday 28th of April 2019

[…] TOMATO SAUCE: The trick to this flavorful soup is the tomato based broth. A lot of minestrone soups that people make are vegetable broth based. I love adding the tomato sauce to this soup to make the flavor to the next level and make it creamier. Feel free to use your favorite or a homemade sauce.  […]

Stephie @ Eat Your Heart Out

Thursday 26th of September 2013

YES. Roast all the tomatoes! (We were clearly on the same roasted tomato brain wave this week!)

Lisa @ Garnish with Lemon

Thursday 26th of September 2013

Seriously going to the Farmer's Market now to get some to make this! YUMMY!


Thursday 26th of September 2013

I am cherishing the end of our farmers market for things like this!

Stefanie @ Sarcastic Cooking

Wednesday 25th of September 2013

Yes please! You know I love tomatoes in all forms or varieties. I can smell this sauce simmering away on my stove already!


Wednesday 25th of September 2013

Tomato season is my favorite--I am so sad that summer is ending and my garden is pretty much done!


Wednesday 25th of September 2013

You are so lucky! I had a bad tomato summer.