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Bring a large pot of salted water to a rolling boil. Add the rotini pasta and the optional teaspoon of olive oil. Cook according to package directions until al dente, about 7-9 minutes. Reserve 1/2 cup of pasta water before draining. Drain the pasta and set aside.

While the pasta cooks, heat 2 tablespoons of olive oil in a large skillet or Dutch oven over medium heat. Add the chopped yellow onion and sauté for 3-4 minutes until softened and translucent.

Add the minced garlic, chopped red bell pepper, and chopped zucchini to the skillet. Cook for another 5-7 minutes, stirring occasionally, until the vegetables are tender-crisp.

Stir in the undrained diced tomatoes, tomato paste, vegetable broth, Italian seasoning, red pepper flakes (if using), salt, and black pepper. Bring the sauce to a gentle simmer and cook for 5 minutes, allowing the flavors to meld.

Add the fresh spinach to the skillet, stirring until it wilts into the sauce, about 1-2 minutes.

Add the cooked and drained rotini pasta to the skillet with the sauce. Toss gently to combine, ensuring the pasta is evenly coated. If the sauce seems too thick, add a splash or two of the reserved pasta water until desired consistency is reached.

Serve immediately, garnished with grated Parmesan cheese and fresh chopped basil.


Bring a large pot of salted water to a rolling boil. Add the rotini pasta and the optional teaspoon of olive oil. Cook according to package directions until al dente, about 7-9 minutes. Reserve 1/2 cup of pasta water before draining. Drain the pasta and set aside.

While the pasta cooks, heat 2 tablespoons of olive oil in a large skillet or Dutch oven over medium heat. Add the chopped yellow onion and sauté for 3-4 minutes until softened and translucent.

Add the minced garlic, chopped red bell pepper, and chopped zucchini to the skillet. Cook for another 5-7 minutes, stirring occasionally, until the vegetables are tender-crisp.

Stir in the undrained diced tomatoes, tomato paste, vegetable broth, Italian seasoning, red pepper flakes (if using), salt, and black pepper. Bring the sauce to a gentle simmer and cook for 5 minutes, allowing the flavors to meld.

Add the fresh spinach to the skillet, stirring until it wilts into the sauce, about 1-2 minutes.

Add the cooked and drained rotini pasta to the skillet with the sauce. Toss gently to combine, ensuring the pasta is evenly coated. If the sauce seems too thick, add a splash or two of the reserved pasta water until desired consistency is reached.

Serve immediately, garnished with grated Parmesan cheese and fresh chopped basil.
