Tomato sauces as a category are like little black dresses in a wardrobe. They pair with just about anything—spoon them over classic beef ravioli, serve alongside fresh homemade pasta, or tuck them into a sausage and spinach calzone.

What makes this particular tomato sauce extra special is that it starts with cherry or grape tomatoes and roasts them until they’re perfectly caramelized and bursting with the richest, sweetest flavor.

Close-up of rotini pasta with tomato sauce, garnished with chopped herbs and grated cheese, with a fork lifting a portion.
This is savory and sweet tomato sauce perfect for vegetarian guests or served with your favorite protein.

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It makes the perfect lazy Sunday cook.

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Roasted tomato goodness

Fair warning: this isn’t a quick tomato sauce time-wise—but it is a super easy one. All you need is a sheet pan for roasting the veggies and a blender to make the sauce smooth.

I love slow roasting all kinds of tomatoes because it coaxes out every last bit of flavor, especially from bite-sized tomatoes like cherry, grape, or any small variety. As they roast slowly, the juices reduce, the sugars concentrate, and what’s left is a super intense, jammy sweetness that a quick sauté can’t provide.

TIP: Cherry tomatoes do release some water as they roast, but once that moisture cooks off, their sugars caramelize into something rich and intense. Grape tomatoes aren’t quite as juicy, but their meaty texture makes them just as perfect for this slow-roasted sauce.

Assorted ingredients on a brown surface, including tomatoes, pasta, onion, herbs, seasonings, cheese, baby carrots, milk, and tomato paste.
Pictured here are the Angel Sweets brand of tomatoes.

Sweet boosters

Carrots and garlic are roasted along with the tomatoes and while the carrots accelerate the sauce’s sweetness factor and add an orangey hue, the garlic adds the best mellow roasted bite.

Easy and slow roasted tomato sauce: step by step

The key to this sauce is roasting the tomatoes, carrots and garlic on a low temperature for a long time. After that, I blend the vegetables until smooth.

At this point, you could refrigerate or even freeze the pureed vegetables for a simple make ahead meal. Read on to see how to make that happen…

A baking sheet with cherry and grape tomatoes, baby carrots, and garlic cloves arranged in sections, all seasoned with salt and pepper.
1. To a large sheet pan, add small tomatoes, baby carrots and whole unpeeled garlic cloves. Drizzle with olive oil and season with salt, pepper and some fresh thyme.
Roasted cherry tomatoes, baby carrots, garlic, and shallots on a baking sheet, with bowls of salt and pepper and a bottle nearby.
2. Slow roast for about 1 hour until the tomatoes burst and are caramelized. Remove the garlic sooner if needed. Then slide the garlic out of the skins and add to a blender.
Roasted tomatoes and carrots inside a blender, ready to be blended.
3. Add the tomatoes and carrots to the blender. Remove the hole cap in the blender and place a folder towel over top to help capture the steam.
A top-down view of a blender containing smooth, blended orange-red tomato pasta sauce.
4. Start the blender on low and slowly ramp up and puree the veggies to make a smooth thick sauce with the texture of a dip.

>> Safety tip <<

Be sure to remove the center cap of the blender and cover the hole with a folded towel to capture the steam. This helps prevent the contents of the blender from exploding and accidental burns.

Cooked rotini pasta sits on top of cherry tomato sauce in a black pot, ready to be mixed together.
5. With help from a spatula, pour the roasted tomato sauce into the pan the pasta was previously cooked in. Add the drained pasta to the pot on top of the sauce.
Cooked rotini pasta mixed with orange-red cherry tomato sauce, stirred with a wooden spoon in a pot.
6. Toss the pasta and sauce and at this time, add in a bit of reserved pasta water, adding more as needed to reach the saucy texture you like.
A close-up of rotini pasta covered in roasted cherry tomato sauce, topped with grated cheese and chopped fresh herbs, with a fork lifting a portion.
7. Garnish with fresh basil and parmesan cheese.

Pasta water down the drain?

If you accidentally threw out all the pasta water, relax!

Pasta water has an important role in Alfredo sauce (and most pasta sauces) by emulsifying the sauce, thickening and making it creamy at the same time. But…you have options.

Here’s what you’ll do:

Add about 1/4 teaspoon of cornstarch to a cup of boiling water. Tada! You made something with the same thickening properties of pasta water!

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A bowl of ridged pasta in roasted tomato sauce, topped with grated cheese and chopped herbs, sits on a green patterned cloth with a spoon nearby.
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Slow Roasted Tomato Sauce for Pasta

A slow roast method is the key to this rich roasted tomato pasta sauce. Baby carrots and garlic join bite sized carrot or grape tomatoes for the ultimate savory and sweet pasta dish. Talk about the perfect lazy Sunday supper recipe — it is beyond simple, can be made ahead, and literally everyone loves it.

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Prep Time:5 minutes
Cook Time:1 hour
Total Time:1 hour 5 minutes
Servings 6
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Ingredients
 

Instructions

  • Preheat oven to 325°. On a large sheet pan, toss the tomatoes and carrots in the olive oil. Drizzle some over the unpeeled garlic cloves. Season with salt, pepper and sprinkle with fresh thyme leaves.
    1 lb grape or cherry tomatoes, 1 head of garlic, 1 cup baby carrots, 2 Tablespoons olive oil, 3 sprigs of fresh thyme, 1 teaspoon salt, ½ teaspoon pepper
  • Roast the vegetables for about 1 hour or until caramelized, checking the garlic at the 25 minute mark (remove as needed). Squeeze the cloves out of the skins and add to a blender.
    Finish roasting the tomatoes and carrots until caramelized and golden, about 45 minutes.
  • Allow the veggies to slightly cool before adding the remaining contents of the into the blender.
    IMPORTANT: Remove the small cap/ stopper covering the whole in the center of the blender and cover the opening with a folded dish towel. Turn the blender on low and puree the vegetables until smooth, ramping up the speed. This should take no more than a minute or two.
  • Boil the pasta in a pot of salted water until al dente according to the package directions. Once cooked, reserve 1 cup of pasta water.
    Drain the pasta in a colander. To the same pot, add the roasted tomato sauce and then pour over the pasta. Toss until coated adding any reserved pasta water to loosen the sauce as needed. Stir in 1/4 cup of pasta water and then ramp up to the desired texture.
    ½ lb fusilli pasta
  • Serve immediately with grated parmesan cheese and basil leaves.
    freshly grated parmesan cheese, fresh basil to garnish

Notes

I love serving this alongside some roasted pork or juicy chicken breasts.
If you use anything smaller than a grape tomato, reduce the oven temp a bit perhaps to 300° and possibly lessen the roasting time. The tomatoes will let you know when they’re done. If you start seeing them burn, it’s time to remove them from the oven.
Course: Main Course, Pasta
Cuisine: Italian
Author: Lori Murphy
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