Marinara sauce is a simple, flavorful tomato sauce made with diced tomatoes, tomato paste, olive oil, and dried herbs simmered together until thick and rich.
Cook the onion until soft: Let the onion sauté until it’s translucent so it sweetens and blends smoothly into the sauce.
Stir the tomato paste in well: Tomato paste can clump, so stir it in thoroughly before simmering for the smoothest texture.
Simmer uncovered: Let the sauce simmer uncovered so it thickens naturally and the flavors concentrate.
Blend if you want it smooth: An immersion blender makes the sauce feel more like a restaurant-style marinara, but it’s optional.
Taste at the end: Tomatoes vary, so adjust salt, pepper, and herbs after simmering to get the flavor just right. dried herbs for fresh ones if available, adding them near the end for the best flavor.