Easy Oven Roasted Tomato Sauce

We’re gonna talk about Roasted Tomato Sauce today. If my husband Jeremy had his way, we would eat pasta every night until the end of time.

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So I started roasting my own fresh tomatoes, and wow, did it make a difference! You don’t have to be a gardener (though that improves the flavor even more), but making your own Roasted Tomato Sauce really makes you feel like a pro.

The sweet spots get all caramelized, the garlic smells like a pizza shop, and the house feels cozy. Even if the laundry is still judging me from the couch. HA!

This sauce is also a handy plan for “Oops, I bought a lot of tomatoes at the farmers’ market.” Especially if you’re worried that said tomatoes are gonna go bad.

Big roma tomatoes or cute cherry tomatoes, toss them on a large roasting pan, splash on good olive oil and balsamic vinegar, and let the hot oven do the magic.

After two hours the veggies look a little charred (that’s flavor!), and you whirl everything with an immersion blender or food processor into the smoothest, richest red sauce ever.

We spoon it over our favorite pasta, spread it on pizza crust, and even dunk grilled cheese into it like soup.

Jeremy says it’s his “top five dinner victories,” right up there with when I remembered his mom’s birthday. Ready to make some Roasted Tomato Sauce? Let’s dive in!

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Jump to:

• WHY THIS RECIPE WORKS:
• INGREDIENTS NEEDED (SCROLL TO THE BOTTOM OF THIS POST FOR THE FULL RECIPE CARD):
• HOW TO MAKE ROASTED TOMATO SAUCE:
• FAQ: FREQUENTLY ASKED QUESTIONS ABOUT THIS RECIPE:
• DO I HAVE TO USE BALSAMIC?
• CAN THIS BE MADE AHEAD?
• ANY ADDITIONS?
• ANY SUBSTITUTIONS?
• HOW TO STORE:
• DANA’S TIPS AND TRICKS:
• Easy Oven Roasted Tomato Sauce

1. Roasting Adds Deep Flavor
   High-heat roasting concentrates the juice in ripe tomatoes, giving you a sweet, slightly smoky, flavorful sauce without hours on the stove.
2. Simple, Fresh Ingredients
   Tomato, onion, garlic cloves, fresh basil, and a kiss of balsamic vinegar—no mystery stuff, just pantry basics that taste like you grew them yourself.
3. Make Once, Use Many Ways
   The finished sauce keeps in mason jars or freezer bags, so weeknight dinners turn into a quick meal—just thaw, warm, and twirl!

• tomatoes
• yellow onion
• garlic
• olive oil
• balsamic vinegar
• fresh oregano
• kosher salt
• black pepper
• fresh basil

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1. Preheat the oven to 425°F.
2. Add the diced tomatoes, onion, garlic, olive oil, vinegar, oregano, salt, and pepper in a large roasting pan.
3. Toss well to combine.
4. Place in the oven and cook for 30 minutes, stir well, and cook for an additional 30 minutes until the top is blackened in some places.
5. Pour everything into a Dutch oven and blend with an immersion blender until smooth.
6. Simmer, uncovered for 45-60 minutes, stirring occasionally. This will thicken the sauce; how long you cook it down is to your preference.
7. Stir in the chopped basil and serve immediately.

DO I HAVE TO USE BALSAMIC?

Nope. Red-wine vinegar, lemon juice, or even a splash of tomato paste plus water can stand in.

Each of these is going to have their own particular flavor.

If you’ve got another idea, be my guest.

Balsamic just gives a little sweet zip.

CAN THIS BE MADE AHEAD?

Yes! Cool the sauce, ladle into airtight containers, and chill 1 week or freeze 4 months.

Tip: flatten freezer-safe containers or bags for faster thawing.

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ANY ADDITIONS?

Yeppers! I’m a big fan of mushrooms in my tomato sauce. How about you?

• pinch of red pepper flakes for gentle heat
• grated parmesan cheese stirred in at the end
• sautéed zucchini noodles for extra veggies
• roasted red bell pepper blended into the sauce
• spoon of Italian seasoning or dried thyme
• dash of garlic powder if you love extra garlic
• handful of fresh spinach wilted in before serving
• crumble of cooked Italian sausage for protein
• splash of extra virgin olive oil right before plating
• sprinkle of toasted pine nuts for crunch

ANY SUBSTITUTIONS?

Let your taste buds (or your dietary needs) be your guide!

I’ve always got a few options up my sleeve.

• Roma tomatoes → plum tomatoes or grape tomatoes
• Fresh oregano → dried oregano (1 tsp dried = 1 Tbsp fresh)
• Olive oil → avocado oil or canola oil
• Balsamic vinegar → red pepper vinegar or white wine vinegar plus ½ tsp sugar
• Yellow onion → shallots or red onion for a sweeter taste

ROOM TEMPERATURE: Cool jars, then keep on the counter only during dinner service—about 2 hours—before chilling.

REFRIGERATOR: In an airtight container, sauce lasts 6-7 days. The flavors deepen—Jeremy says it’s even better on day three!

FREEZER: Portion into freezer bags or silicone trays, squeeze out air, and freeze up to 4 months.

Label with a marker so you don’t mistake it for chili.

Thaw in fridge overnight or dunk the bag in cold water for 30 minutes.

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There you have it: a roasted tomato sauce that turns a pile of fresh tomatoes into liquid gold.

It’s the best way to use that garden bumper crop or the off-season tomatoes from the grocery.

Learn more about the author, Dana DeVolk, on our ABOUT ME page!