Here's what my research on canning squash revealed... seems it's not like the USDA has had a huge outbreak of bacteria in home canned squash or anything, just that they can't find their documentation. I canned squash.
*Disclaimer: Recommendations for canning summer squashes, including zucchini, that appeared in former editions of So Easy to Preserve or USDA bulletins have been withdrawn due to uncertainty about the determination of processing times. Squashes are low-acid vegetables and require pressure canning for a known period of time that will destroy the bacteria that cause botulism. Documentation for the previous processing times cannot be found, and reports that are available do not support the old process. Slices or cubes of cooked summer squash will get quite soft and pack tightly into the jars. The amount of squash filled into a jar will affect the heating pattern in that jar.
I signed up recently for text alerts from the State Farmers Market and received my first one this past week... "summer squashes will be available beginning this week!" We planned a Saturday excursion to the Farmers Market. The day before our planned visit, I got a call from my son and daughter-in-law saying they were leaving early for a vacation in Florida and would be passing through our town on their way... would we like to meet somewhere and have breakfast with them as they passed through? Well, sure! We chose a spot close to the interstate so they wouldn't need to stray far from their travel route, and close to the market so we could head on over there after breakfast.
It was an enjoyable visit with the kids, filled with laughter, everybody talking at once, good food, good fellowship, hugs and happiness! We saw them on their way on down the highway, then took ourselves to market looking for squash... and squash we found! along with green peas (but that's another story for another day).
A few more errands and then back home to begin the squash adventure... Here's what I did...
First, of course, I washed my squash, giving it a good scrub in the sink.
I put my jars in the dishwasher to make sure they were clean and sterilized (my dishwasher gets quite hot).
I put my lids and rings on to simmer and stay hot until I was ready for them.
Then I sliced of the ends of the squash and cut them into about a half inch slices, cutting the slices in two on the "fat" parts of the vegetable.
I placed the sliced squash into a saucepan, covering them with water and brought the mixture to a boil.
Once my squash was heated through and beginning to soften, I started filling my hot
pint canning jars
with the vegetable/water mixture, leaving about a half inch headspace.
I made sure there were no trapped air bubbles and that there was plenty of liquid surrounding the squash pieces. I added a half teaspoon of
canning salt 
to each jar.
I wiped the jar rims with a damp cloth.
Then, removing my lids using may handy dandy
magnetic wand gadget
, I tightened the hot lids onto the jars (fingertip tightness!)
I loaded the jars into my
pressure canner
and processed the pints at 10 pounds of pressure for 25 minutes (quarts would take 30 minutes). After processing, I allowed my pressure canner to cool down on its own, the pressure dropping to zero before I removed the lid and took the jars out using my jar lifter. I set the hot jars on a folded dish towel on the counter to cool and to wait for the PING of each successfully sealed jar.
There was a time in my life that I would only eat summer squash breaded and fried and that was only possible when it was garden fresh... but then I discovered Squash Casserole! Much of my store of canned squash will go toward making this yummy concoction...
2 cups summer squash (I'll use one of my pint jars, drained... or maybe two!)
1/2 chopped onion
1 can cream of chicken soup
1 beaten egg
1 cup sour cream
1/2 cup shredded cheese
8 ounces seasoned stuffing mix
1/2 cup melted butter
Mix ingredients together and bake in a 9x13 baking dish at 350 degrees for about 30 minutes, or until onions are tender. Sometimes I add shredded carrots to the mix, just to change it up a little. Delicious!
Or... maybe I'll try a new recipe, like Summer Squash Bread...
3 eggs, beaten
2 cups white sugar
1 cup vegetable oil
2 teaspoons vanilla extract
3 cups all purpose flour
3 teaspoons baking powder
2 teaspoons ground cinnamon
2 teaspoons ground nutmeg
2 cups shredded summer squash (I'm thinking one of my canned pint jars, drained well)
Preheat oven to 325 degrees, grease 9x13 baking dish. In large bowl, using an electric mixer to beat the eggs until fluffy, beat in sugar, oil, and vanilla. Gradually mix in the flour, baking powder, cinnamon, and nutmeg, fold in squash. Transfer to prepared baking pan. Bake 45 minutes in the preheated oven until a knife inserted in the center comes out clean.
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