How to turn pasta sauce into a longer-lasting ketchup?
I was making a bacon sandwich earlier and I have some nice jars of tomato pasta sauce in the cupboard. I thought it'd make a great relish but it would go off too quickly in the fridge to make i economical. It got me wondering whether there's anything you can do to make an existing tomato sauce into a something with a longer shelf life.
For example, could you add vinegar or salt to tip the sauce over into more of a preserved sauce?
Similar question might apply to salsas, I suppose?
Best Answer
Ketchup keeps because it is full of sugar (reduces water activity) and vinegar (acid, keeps microbes and especially molds at bay). A boatload of both. Look at a ketchup recipe for reference...
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How long can homemade ketchup last?
Pack and Store Your Homemade Ketchup Ketchup will keep 3 weeks in the fridge or 6 months in the freezer. Ketchup can also be water bath canned using the hot pack method. Leave 1/4\u201d headspace and process the 1/2 pint jars for 15 minutes.What is added to tomato ketchup to preserve it?
For quarts, use 2 tablespoons of bottled lemon juice or \xbd teaspoon citric acid. The acid can be added directly to each jar before filling them with the product. If this makes the product taste too acidic, add a little sugar to offset the taste.Can I use tomato sauce instead of ketchup?
Tomato sauce is slightly more soupy than ketchup, but is very similar in flavor. You can use it as a substitute for sauces and in cooking.What is the difference between tomato sauce and ketchup?
In the US, ketchup is prepared with tomatoes, sugar, vinegar/acetic acid and spices. It is used as a dressing or table condiment. Ketchup is cold and is never heated as a rule. Tomato sauce, on the other hand, is made from tomatoes, oil, meat or vegetable stock and spices.How To Improve Store-Bought Tomato Sauce
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