Sunday Slow Simmered Tomato Soup

Name: Sunday Slow Simmered Tomato Soup
Prep time: 15 min
Cook time: 1 h
Total time: 1 h 15 min
Yield: 4 servings
Ingredients: 2 tablespoons olive oil; 1 medium onion, chopped; 3 cloves garlic, minced; 2 cans (15 ounces each) crushed tomatoes; 2 cups vegetable broth; 1 teaspoon sugar; Salt and pepper to taste; 1/4 cup fresh basil, chopped

Highlighted under: Comfort Food

I adore the comforting warmth of a bowl of slow-simmered tomato soup, especially on a lazy Sunday. As the ingredients meld together over time, the flavors deepen, creating a rich and satisfying dish that warms the heart. With just the right balance of acidity from the tomatoes and the sweetness of fresh basil, this soup becomes a favorite in my household. It’s perfect alongside a grilled cheese sandwich or simply on its own, offering both nostalgia and a welcomed hug in every spoonful.

Created by

Margaret Hill

Last updated on 2026-01-06T09:58:08.182Z

We spent an entire afternoon experimenting with different tomato varieties to find that perfect blend for our soup. The combination of sweet and acidic tomatoes truly elevates the dish, making each spoonful a delight. I’ve found that allowing the soup to simmer for a full hour allows the flavors to develop beautifully, offering a depth that quicker cooking methods simply can’t achieve.

During our latest attempt, we added a splash of balsamic vinegar right before serving, and it was a game-changer! The richness it brought to the already vibrant flavors made the soup irresistible. I always recommend tasting and adjusting seasonings as you go to personalize it to your preference, which is the hallmark of any great soup!

        Why You'll Love This Recipe
        The depth of flavor from slow simmering creates an unforgettable taste.
A touch of fresh basil brightens the rich tomato essence.
Versatile enough to pair with your favorite sandwich or serve as a stand-alone meal.

      

The Role of Fresh Ingredients

Using high-quality, ripe tomatoes can significantly enhance the flavor of your soup. Canned crushed tomatoes are convenient, but opting for ones packed in their own juice, without added preservatives, can deepen the overall taste. If you prefer fresh tomatoes, you'll need about 2.5 pounds; just be sure to peel and crush them before adding them to the pot for optimal texture.

Onions and garlic are the backbone of this soup. Sautéing them in olive oil helps to release their natural sugars, creating a sweet foundation for the dish. Cook the onions until they are just translucent before adding garlic, which should only be cooked until fragrant to avoid bitterness. Use a pan with a heavy bottom to prevent uneven cooking.

Adjusting Flavor Profiles

The addition of sugar balances the acidity from the tomatoes, but this can be adjusted based on your taste. For a more robust flavor, consider adding a splash of balsamic vinegar or a pinch of red pepper flakes to introduce extra depth and complexity without overpowering the main ingredients.

Fresh basil not only brightens the dish but also contributes a wonderful aroma. If you don't have fresh basil, dried herbs can be a substitute; however, add them earlier in the cooking process as they take longer to release their flavors. Fresh herbs should be added towards the end to preserve their delicate properties.

Ingredients

For the Soup

2 tablespoons olive oil
1 medium onion, chopped
3 cloves garlic, minced
2 cans (15 ounces each) crushed tomatoes
2 cups vegetable broth
1 teaspoon sugar
Salt and pepper to taste
1/4 cup fresh basil, chopped

Instructions

Sauté Aromatics

In a large pot, heat the olive oil over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes. Stir in the minced garlic and cook for an additional minute until fragrant.

Add Tomatoes and Broth

Pour in the crushed tomatoes and vegetable broth. Stir in the sugar, and season with salt and pepper. Bring the mixture to a boil.

Simmer the Soup

Reduce the heat to low, cover, and let the soup simmer for 60 minutes, stirring occasionally. This allows the flavors to meld together beautifully.

Finish and Serve

After simmering, stir in the fresh basil. Adjust seasoning if necessary. Serve hot, ideally with a side of crusty bread or a grilled cheese sandwich.

Pro Tips

For an extra creamy texture, blend the soup with an immersion blender before serving. You can also try adding a splash of cream for a decadent finish.

Storage and Reheating Tips

This tomato soup can be stored in an airtight container in the refrigerator for up to five days. To extend its shelf life, consider freezing it for up to three months. When freezing, leave some space in the container as the soup will expand. To reheat, gently thaw in the refrigerator overnight and warm on the stove over low heat until heated through, stirring often to maintain an even temperature.

If the soup becomes too thick when reheating, simply add a splash of vegetable broth or water to achieve your desired consistency. Always taste and adjust seasoning, as flavors can mellow during storage.

Serving Suggestions

While this soup pairs beautifully with a classic grilled cheese sandwich, you can elevate it by experimenting with toppings. Consider adding a dollop of cream or a sprinkle of grated Parmesan for richness. Croutons or a drizzle of basil oil can provide an enjoyable crunch and fresh finish.

For a heartier meal, consider serving the soup with a side salad or grilled vegetables. This versatility makes it an excellent choice for lunch or dinner, allowing you to create a warm, fulfilling meal any time.

Questions About Recipes

→ Can I use fresh tomatoes instead of canned?

Absolutely! Use about 2 to 3 pounds of fresh tomatoes, blanched and peeled, for the best flavor.

→ How can I store leftover soup?

Store any leftovers in an airtight container in the fridge for up to 5 days, or freeze for up to 3 months.

→ What else can I add to the soup?

Feel free to add vegetables like carrots or celery during the sautéing step for extra nutrition.

→ Can I make this soup vegan?

Yes! Just ensure the vegetable broth is certified vegan and all ingredients are plant-based.