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Creamy one pot vegetarian pasta in a large bowl with spoon.
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5 from 9 votes

One Pot Creamy Pasta Recipe

This one pot creamy pasta is rich, cozy, and weeknight-friendly, with rotini simmered right into a tomato mascarpone sauce until every bite is silky and flavorful. Fresh zucchini, tomatoes, and basil keep it bright while still feeling like comfort food.
Prep Time10 minutes
Cook Time25 minutes
Total Time35 minutes
Course: Main Course
Cuisine: American
Diet: Vegetarian
Servings: 6 servings
Calories: 303kcal
Author: MaryAnne

Ingredients

  • 2 Tablespoons extra-virgin olive oil
  • 1 yellow onion, chopped
  • 4 garlic cloves, minced
  • ½ teaspoon dried oregano
  • 2 tomatoes, diced
  • 1 zucchini, diced
  • 1 (6-ounce) can tomato paste
  • 1 ½ teaspoons salt
  • ¼ teaspoon black pepper
  • 12 ounces rotini pasta
  • 3 cups boiling water
  • 3 Tablespoons mascarpone cheese
  • ½ cup fresh basil, chopped

Instructions

  • In a Dutch oven or large pot, heat olive oil over medium-low heat. Add onions and sauté until translucent, about 5-6 minutes. Add garlic and oregano, and cook for an additional minute.
  • Add tomatoes, zucchini, tomato paste, salt, and pepper, and stir to combine. Cook for another 4-5 minutes.
  • Pour boiling water and rotini into the pot. Give it a stir and simmer for 10-12 minutes. You may need to adjust the heat to low if it reaches a rapid boil and starts to splatter. Remove from heat.
  • Add mascarpone and basil and stir thoroughly. If mixture is too thick, add an additional tablespoon or two of hot water. Garnish with additional basil. Serve immediately.

Video

Notes

  • Store leftovers in an air-tight container in the refrigerator for up to 4 days. Reheat gently on the stovetop over medium-low heat or in the microwave, adding a splash of water to loosen the sauce.
  • Add hot water only as needed. If the pasta needs more time but the sauce is getting too thick, add 1-2 tablespoons at a time.
    Stir in mascarpone off the heat. This helps keep the sauce smooth and creamy.
 

Nutrition

Calories: 303kcal | Carbohydrates: 46g | Protein: 9g | Fat: 9g | Saturated Fat: 3g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Cholesterol: 8mg | Sodium: 594mg | Potassium: 258mg | Fiber: 3g | Sugar: 3g | Vitamin A: 283IU | Vitamin C: 8mg | Calcium: 43mg | Iron: 1mg
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