How To Defrost Frozen Sauce In Glass Jar. When you shift it to a refrigerator, the container defrosts slowly and results in an even thawing. In a glass jar, how do you freeze pesto?

However, it often takes me a while to prepare them, which means i make a big batch at once and then freeze it in individual portions. You can freeze spaghetti sauce in glass jars if the glass is strong, if there is at least 1/2 an inch of space at the top of the glass so the sauce can expand and if the lid seals tightly. If you follow these tips you can freeze in mason jars and not have broken jars!