In your large saucepan, heat the olive oil over medium heat. Add the finely chopped onion and celery, stirring frequently until they become translucent, about 5-7 minutes. Next, toss in the minced garlic and sauté for an additional minute until fragrant.
Pour in the crushed tomatoes, stirring well to combine with the sautéed vegetables. This is where the magic starts to happen, as the ingredients meld together to create a flavorful base.
Sprinkle in the salt and pepper, adjusting to your taste. Allow the sauce to simmer on low heat for about 20 minutes. This simmering time is crucial as it allows the flavors to develop beautifully.
Once the sauce has thickened slightly, stir in the roughly chopped basil. Allow it to cook for an additional 5 minutes. The fresh basil will add a vibrant flavor that will elevate your sauce to new heights.
Your Keto Spaghetti Sauce is now ready! Serve it over your favorite low-carb pasta alternative or enjoy it with grilled chicken or zucchini noodles. Don’t forget to top it with some grated Parmesan for an extra indulgence!