
Carrageenan is a sneaky additive that shows up in canned goods, dairy products, and processed sauces far more often than most people realize, which makes a from-scratch marinara like this one genuinely worth having in your rotation. Every ingredient here is clean and straightforward — San Marzano tomatoes, garlic, olive oil, red pepper flakes, and fresh basil — with zero need for anything processed or stabilizer-laden. The technique of crushing the whole tomatoes by hand gives the sauce a rustic, uneven texture that no jarred version can replicate, and slow-simmering them in garlicky olive oil builds a depth of flavor that tastes like it took far more effort than it did. Finishing the pasta directly in the sauce and adding a splash of starchy cooking water is the move that makes everything silky and cohesive rather than soupy. A drizzle of good olive oil and a handful of freshly grated Parmesan at the end bring it all together into something that feels genuinely restaurant-worthy. This is the kind of weeknight dinner that earns a permanent spot in your meal plan.
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Bring a large pot of water to a boil over high heat. Add the kosher salt, then the spaghetti, and cook, stirring occasionally, until al dente — tender with a slight resistance at the center, about 1–2 minutes less than the package directions. Reserve 1/2 cup of the pasta cooking water before draining. Drain the spaghetti through a colander and set aside.
While the pasta water heats, pour the canned tomatoes into a large bowl and crush them by hand, breaking them into rough, uneven pieces. Set aside.
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