Slow-Simmered Heirloom Tomato Sauce with Dried Oregano

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A deeply flavorful tomato sauce developed through slow cooking, where dried herbs and time meld into a rich, complex base for pasta or polenta. This italian-inspired quick meals ready in about 145 minutes blends San Marzano tomatoes, tablespoons dried oregano, 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 120 calories and feeds 8, 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.

★ 4.4 (9 ratings) Prep: 30 min Cook: 115 min Serves 8 Italian cuisine 120 cal/serving
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Ingredients

Instructions

  1. Step 1: Heat 1/4 cup extra virgin olive oil in a large heavy-bottomed pot over medium-low heat. Add 1 medium finely diced white onion, 1 medium grated carrot, and 2 finely diced celery stalks, cooking for 10 minutes until softened and translucent, stirring occasionally.
  2. Step 2: Add 4 cloves minced garlic and 2 tablespoons dried oregano, stirring for 1 minute until fragrant but not browned.
  3. Step 3: Stir in 4 cups San Marzano tomatoes, 1 teaspoon sea salt, and bring to a gentle simmer. Reduce heat to low, cover partially, and cook for 90 minutes, stirring every 15 minutes until sauce thickens and coats the back of a spoon.
  4. Step 4: Remove from heat, stir in 1/4 cup chopped fresh basil, and let sit for 10 minutes before serving.

Frequently asked questions

How long does Slow-Simmered Heirloom Tomato Sauce with Dried Oregano take to make?

Total time is about 145 minutes (30 min prep + 115 min cook). A small batch typically covers several meals in the week — store as the recipe directs.

How do I store leftover Slow-Simmered Heirloom Tomato Sauce with Dried Oregano?

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 Heirloom Tomato Sauce with Dried Oregano?

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 Heirloom Tomato Sauce with Dried Oregano for a different number of people?

The recipe is written for 8 servings. Multiply each ingredient by (your serving target / 8). 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 Heirloom Tomato Sauce with Dried Oregano?

Italian quick meals 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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