Slow-Simmered Italian Tomato & Herb Sauce with Heirloom Tomatoes

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A true Italian nonna-style sauce made with slow-cooked heirloom tomatoes, garlic, and basil, embodying the essence of authentic Italian cooking. This italian-inspired pasta ready in about 85 minutes blends medium, diced heirloom tomatoes, minced garlic, extra-virgin olive oil into a versatile sauce that lifts everything from grain bowls and roasted vegetables to grilled proteins — a small-batch staple worth keeping in the fridge. Each serving lands at about 110 calories and feeds 4, so a small batch covers several meals across the week without taking over the fridge. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

★ 4.2 (9 ratings) Prep: 15 min Cook: 70 min Serves 4 Italian cuisine 110 cal/serving
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Ingredients

Instructions

  1. Step 1: Heat olive oil in a deep saucepan over medium-low heat. Add minced garlic and cook for 1 minute until fragrant but not browned.
  2. Step 2: Stir in diced tomatoes, wine, salt, and pepper. Bring to a gentle simmer, then reduce heat to low and cover partially.
  3. Step 3: Simmer uncovered for 1 hour, stirring occasionally, until tomatoes break down and sauce thickens to coat the back of a spoon.
  4. Step 4: Stir in half the basil, then remove from heat. Let sit for 10 minutes before stirring in remaining basil for vibrant color and aroma.

Equipment for this recipe

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Frequently asked questions

How long does Slow-Simmered Italian Tomato & Herb Sauce with Heirloom Tomatoes take to make?

Total time is about 85 minutes (15 min prep + 70 min cook). A small batch typically covers several meals in the week — store as the recipe directs.

How do I store leftover Slow-Simmered Italian Tomato & Herb Sauce with Heirloom Tomatoes?

Transfer to an airtight jar and refrigerate for up to 5–7 days. Most sauces freeze well for up to 2 months — portion into small containers or freezer bags so you can thaw only what you need. Stir before serving; cream- or yogurt-based sauces may separate on standing.

Can I substitute ingredients in Slow-Simmered Italian Tomato & Herb Sauce with Heirloom Tomatoes?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Slow-Simmered Italian Tomato & Herb Sauce with Heirloom Tomatoes for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Slow-Simmered Italian Tomato & Herb Sauce with Heirloom Tomatoes?

Italian pasta like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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