Four days is considered its optimal fridge life. If you freeze, use within six months for best taste and texture.
There are many ways to thicken the sauce. If you want to keep the ingredients minimal and not lose any flavor, I recommend just cooking it a little longer. This way the extra moisture evaporates, thickening the sauce naturally.
Yes, you can freeze the sauce for up to 6 months. Make sure to cool the sauce completely, then use a ladle to transfer the sauce to freezer-friendly bags or containers. The 2 cup portion from this recipe is perfect for 4 servings for future use.
They often contain identical ingredients, but while you can use your marinara sauce on pizza, sauce specifically made for pizza does not need to be simmered because it cooks with the pizza. Spaghetti sauce usually indicates long simmering and additional ingredients like meat.