Chestnut Free Roasted Tomato Sauce
There is something deeply satisfying about a tomato sauce built entirely from scratch, and roasting the tomatoes first takes it to a completely different level. The high heat caramelizes the edges, collapses the flesh, and concentrates every bit of natural sweetness before a single drop hits the pan. Onion wedges and whole garlic cloves roast right alongside the tomatoes, then get blended in with fresh basil, dried oregano, and a subtle warmth from turmeric and red pepper flakes. The result is a rich, velvety sauce with layers of flavor that no jarred version can touch. For anyone navigating tree nut allergies or sensitivities, this kind of recipe is a genuine relief — every ingredient is straightforward, plant-based, and easy to verify, with zero risk of hidden chestnut flour or chestnut-based thickeners that occasionally sneak into specialty or imported sauces. It comes together with pantry staples and a blender, making it as practical as it is delicious. Toss it with pasta, spoon it over roasted vegetables, or use it as a pizza base — this sauce earns a permanent spot in your rotation.
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Learn more →Ingredients
4 servings
- 2 lbs plum tomatoes, halved lengthwise
- 1 medium yellow onion, cut into 8 wedges
- 6 cloves garlic, unpeeled
- 4 tbsp extra virgin olive oil, divided
- 1 tsp kosher salt, plus more to taste
- ½ tsp black pepper
- ¼ tsp red pepper flakes
- ½ tsp dried oregano
- ¼ cup fresh basil leaves, loosely packed
- ½ tsp turmeric
Instructions
- 1
Preheat the oven to 425°F (220°C). Arrange the tomato halves cut-side up on a large rimmed baking sheet. Scatter the onion wedges and unpeeled garlic cloves around the tomatoes. Drizzle with 3 tbsp of the olive oil and sprinkle with the salt, black pepper, and red pepper flakes.
- 2
Roast on the center rack for 40–45 minutes, until the tomatoes are deeply caramelized at the edges, collapsed, and beginning to char in spots, and the onion wedges are softened and golden at the tips.
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