Highbush Cranberry ketchup

One type of berry I picked a lot of this summer were highbush cranberries. I bought a food mill so that I could easily remove the flat seeds and use the pulp. They are still in my freezer, but one of my friends made a batch of this highbush cranberry ketchup. It ended up being more like sweet and sour sauce. Here is the recipe:

Highbush cranberry