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Keto Sauces

Spaghetti Sauce with Cauliflower

I’ve always missed a rich, hearty spaghetti sauce since going keto, and this cauliflower version truly hits the spot. The cauliflower melts into the tomatoes, creating a thick, satisfying sauce without any added sugar. Perfect over zucchini noodles or spaghetti squash, it brings classic Italian flavor with a fraction of the carbs.

15 min Prep time 60 min Cook time 75 min Total time 12 Servings 100 Calories
Spaghetti Sauce with Cauliflower

Ingredients

  • /4 cup olive oil
  • large cloves garlic, chopped
  • sweet onion (such as Vidalia®), chopped
  • cups chopped cauliflower
  • teaspoon dried basil
  • /2 teaspoon black pepper
  • (28 ounce) cans crushed tomatoes

Instructions

  1. Step 1

    I start by warming the olive oil in a large saucepan over medium heat. Once the oil shimmers, I add the chopped garlic, onion, and cauliflower, letting them cook slowly. I stir occasionally, letting the cauliflower pieces turn golden and soft—this usually takes about 30 minutes and fills the kitchen with a lovely aroma. Then, I stir in the basil and black pepper, followed by all three cans of crushed tomatoes. Bringing the mixture to a gentle simmer, I let it bubble away for another 30 minutes, stirring from time to time so nothing sticks to the bottom. You’ll notice the sauce thickens beautifully as the cauliflower breaks down, blending seamlessly into the tomatoes. If you prefer a smoother texture, an immersion blender works wonders right in the pot. Taste and adjust the seasoning with a pinch of salt or extra black pepper before serving. This sauce clings perfectly to keto pasta alternatives, making every bite feel indulgent and homey.

Chef's Tip

I like to roast the cauliflower beforehand for a deeper, nuttier flavor. Just toss the florets in a little olive oil and roast at 400°F until caramelized before adding to the pot—it adds a subtle sweetness without any extra carbs.

Storage Tips

Store leftover sauce in an airtight container in the fridge for up to 5 days. Reheat gently on the stovetop, adding a splash of water if it thickens too much after cooling.

Variation Tips

Serve over spiralized zucchini or spaghetti squash for a classic pasta night. For a heartier meal, stir in cooked ground beef or Italian sausage. You can also use this sauce as a keto pizza topping or blend in fresh basil at the end.

Frequently Asked Questions