Basic Recipe: Oven-Roasted Tomato Sauce

With seasonal tomatoes still a few months away, I find myself longing for that sweet, fresh taste of summer that you really can’t get from anything else. Here in Louisiana, down in Plaquemines parish, the Creole tomatoes are the ones that get top ratings. A vendor at the local farmer’s market offers fall and spring Creole tomatoes–grown in a hothouse I think–and to tell the truth, they aren’t half bad. They certainly beat the heck out of those watery, mealy ones at the grocery.
But they still aren’t summer tomatoes.
This recipe is one of the ways I tide myself over until the summer ones arrive. Tomato sauce has been a staple in my weekly cooking since I’ve had a kitchen of my own, and this recipe has been tweaked and tweaked until I could make it in my sleep. The sauce is super-easy and so versatile, but the basic premise of roasting the tomatoes for a long time and using plenty of Kosher salt to draw out their juices is really the crux of the preparation.
And believe me, when summer tomatoes arrive, this sauce will taste even sweeter.
Oven-Roasted Tomato Sauce
3-4 large tomatoes, chopped
Olive oil to coat
Kosher salt–probably about a tablespoon
Cracked black pepper
1 large yellow onion, chopped
4-5 cloves garlic, chopped
1 28-ounce can crushed tomatoes, or chopped if you want the texture
Preheat oven to 400 degrees.
Arrange the tomatoes on foil-lined baking sheets in a single layer. Drizzle olive oil onto the sheets, and then toss with your hands to make sure all the pieces are coated with oil. Sprinkle liberally with salt and pepper. Roast for about 45 minutes, until they shrivel and begin to blacken around the edges.

Meanwhile, heat 1 tablespoon of oil in a large saucepan (this will hold all of the sauce, so use a big one). Add the chopped onion and garlic and cook over medium heat until very soft, but not brown–about 20 minutes. Season with salt and pepper. If they soften before the tomatoes are done, turn the heat off. When the tomatoes are done, us a spatula to scrape them, with their juices and the black bits crusted on the baking sheet, into the pan with the onion and garlic. Turn the heat back up to medium, and stir, pressing the tomatoes with the back of your spoon to crush them. Add the canned tomatoes, and simmer this mixture for about 20 minutes.
Varations:
- For a richer, silkier sauce, you can swirl in a couple of tablespoons of butter at the end.
- Red wine adds another layer of depth too: turn the heat up on the onions and garlic and dump in about a half a glass to deglaze the pan before adding the tomatoes.
- You can use chopped tomatoes to keep the chunky texture, or crushed tomatoes for a smoother sauce. You can also put the whole thing through the food processor or blender if a smooth texture is what you’re after.
- Portabello mushrooms add an earthy flavor and substance I like if you’re serving the sauce over pasta–you can either add them to the onion-garlic saute, or roast them with the tomatoes. They won’t take as long to cook, about 15-20 minutes.
Ways to use the sauce to follow!
This recipe is my contribution to ARF/5-a-day Tuesday over at Sweetnicks.
March 21st, 2006 at 8:13 pm
I’m craving summer tomatoes, too. Your sauce looks wonderful - I love the deep flavor of oven roasted tomatoes.
March 21st, 2006 at 8:14 pm
Sounds yummy! Thanks for a good recipe to build my anticipation of summer tomotoes. It seems like it will be forever before I can find any out here in Cali! (Maybe never?) Next time you do a basic recipe, could you give us your favorite salad dressing? We’re on the very verge of giving up all things green and leafy . . .
March 22nd, 2006 at 5:41 am
I love the taste of homegrown tomatoes.I used to have a few plants each summer,but I don’t have the room now.This sauce sounds wonderful.
March 22nd, 2006 at 8:28 am
This looks wonderful and easy enough for me to handle. I will definitely have to try. I look forward to your next installment of how you use the sauce, I can see this as a replacement to jarred spaghetti sauce. With your help, I will get this cooking down!!
Thanks!!
March 22nd, 2006 at 2:31 pm
This looks so good. I really envy your Creole tomatoes, though. I haven’t found any that good here!
March 23rd, 2006 at 5:56 pm
Wow, this sauce looks rich and gorgeous. I love the flavor of roasted tomatoes and garlic. There’s nothing like it, is there?
March 24th, 2006 at 8:58 pm
I love to make sauce like this. Makes the house smell good.
March 29th, 2006 at 7:21 pm
I couldn’t agree with you more. It’s like as soon as spring comes all thoughts turn to the bounty of the garden! Roasting the tomatoes is a great idea! Thanks for the recipe.
July 24th, 2008 at 8:32 am
Why would you use yucky canned tomatos in such an otherwise great-sounding recipe??