Add Tomato sauce, molasses and apple cider vinegar. Simmer uncovered or leave lid on crocked for 30 minutes or until sauce is thick like catsup should be.
Add more salt if needed. If it isn't sweet enough for your youngsters add a small amount of maple syrup. I like my catsup tangy so I don't add any additional sweeteners.
Allow catsup to cool for at least 15 minutes before pureeing in a high speed blender.
Store in glass jars in the refrigerator, stays for fresh for at least one month. Any glass jars that you have sitting around in your kitchen will do, no need to go buy anything new.
NOTE ON MOLASSES: There are a couple different types of molasses sorghum and blackstrap. Sorghum has a less bitter flavor than blackstrap and is also slightly sweeter. Hence my choice for this sauce.
Notes
To make this recipe whole30 compliant, omit the molasses. Instead add 2-4 chopped dates to the sauce while it is simmering.