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One-Pot Pasta Recipe with Tomato Basil Parmesan Sauce

One-Pot Tomato Basil Pasta is a weeknight pasta dish cooked start to finish in a single pan. Dry spaghetti simmers directly in seasoned tomato broth, releasing starch that turns the cooking liquid into a glossy, savory sauce.

Inspired by Kitchen Tutor

Total time
30 min
prep + cook
Cost
$2.40
per serving
Servings
4
Diet
vegetarian
Start cooking
One-Pot Pasta Recipe with Tomato Basil Parmesan Sauce

Ingredients

4
  • extra-virgin olive oil2 tablespoons
  • yellow onion, thinly sliced1 small
  • garlic, thinly sliced4 cloves
  • red pepper flakes, optional1/4 teaspoon
  • diced tomatoes with juices1 can (14.5 ounces)
  • low-sodium vegetable broth3 cups
  • water, plus more as needed1 cup
  • spaghetti, broken in half12 ounces
  • kosher salt, plus more to taste1 teaspoon
  • black pepper1/2 teaspoon
  • baby spinach, loosely packed2 cups
  • finely grated Parmesan cheese, plus more for serving1/2 cup
  • unsalted butter1 tablespoon
  • fresh basil leaves, torn1/3 cup
  • fresh lemon juice1 teaspoon

Instructions

  1. 1

    Warm the olive oil in a wide 5-quart pot over medium heat. Add the onion and cook for 3 minutes, stirring often, until it begins to soften.

  2. 2

    Stir in the garlic and red pepper flakes. Cook for 30 seconds, just until fragrant, keeping the garlic pale so it does not turn bitter.

  3. 3

    Add the diced tomatoes with their juices, vegetable broth, water, spaghetti, salt and black pepper. Press the pasta down so most strands touch the liquid.

  4. 4

    Raise the heat to medium-high and bring the liquid to a lively simmer. Stir every minute as the pasta softens and bends into the pot.

  5. 5

    Cook for 10 to 12 minutes, stirring frequently, until the spaghetti is al dente and the liquid has reduced into a loose sauce.

  6. 6

    Fold in the spinach and cook for 1 minute, until wilted. If the pot looks dry before the pasta is tender, add water 2 tablespoons at a time.

  7. 7

    Turn off the heat. Stir in the Parmesan, butter, basil and lemon juice until the sauce looks glossy and lightly coats the pasta.

  8. 8

    Taste and adjust with more salt, pepper or lemon juice. Serve immediately with extra Parmesan and a few fresh basil leaves on top.

Tutor's tips

  • Use a wide pot or deep skillet so the spaghetti cooks evenly and does not clump in the center.
  • Stir often during the first few minutes, because dry pasta releases starch quickly and can stick before it softens.
  • Keep the sauce slightly loose when you turn off the heat, since the pasta will continue absorbing liquid as it rests.

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