Because it is mostly peanut butter, it is a very special treat for all birds. We have grosbeaks, orioles, woodpeckers, sparrows, warblers and chickadees that love eating these cakes. Even the hummingbirds come by on occasion for a taste test. Of course, the chipmunks and squirrels also love the peanut butter cakes.
Place prepared tomatoes in a saucepan and cover with water. Heat to a boil and boil gently for 5 minutes. Add lemon juice or citric acid to canning jars along with 1/2 teaspoon salt to each quart jar, if desired. Pack hot jars with hot prepared tomatoes and fill with boiling water leaving -inch head space.
Once you have all your tomatoes in the stock pot and boiling up a storm, ladle them into your food mill and grind out the mixture into pots, scraping the good stuff off the sides of the cone into your juice. Throw out the remaining pulp and return the juice to the stock pot. Bring back to a rolling boil. Add salt. (I usually add 1 tsp to each litre/quart). This is optional of course. Pour into jars leaving 1/2 inch air space. Place jars into canner and boil for 25 minutes.